HEATS 发表于 2010-9-14 08:28:55

中国钢号基本表示法

<P style="MARGIN: 0cm 0cm 0pt" class=MsoNormal><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">一、我国-钢</A>号表示方法概述</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  钢的牌号简称钢号,是对每一种具体钢产品所取的名称,是人们了解钢的一种共同语言。我国的钢号表示方法,根据国家标准《钢铁产品牌号表示方法》(</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">GB221-79</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">)中规定,采用汉语拼音字母、化学元素符号和阿拉伯数字相结合的方法表示。即:</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">&nbsp;</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号中化学元素采用国际化学符号表示,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Si,Mn,Cr……</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">等。混合稀土元素用</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“RE”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">(或</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Xt”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">)表示。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">&nbsp;</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">产品名称、用途、冶炼和浇注方法等,一般采用汉语拼音的缩写字母表示,见表。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">&nbsp;</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢中主要化学元素含量(</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">)采用阿拉伯数字表示。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">二、我国钢号表示方法的分类说明</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">1</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.碳素结构钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">由</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Q+</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">数字</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">+</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">质量等级符号</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">+</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">脱氧方法符号组成。它的钢号冠以</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Q”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,代表钢材的屈服点,后面的数字表示屈服点数值,单位是</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">MPa</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Q235</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示屈服点(</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">σs</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">)为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">235&nbsp;MPa</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">的碳素结构钢。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">必要时钢号后面可标出表示质量等级和脱氧方法的符号。质量等级符号分别为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">A</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">B</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">C</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">D</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。脱氧方法符号:</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">F</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示沸腾钢;</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">b</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示半镇静钢:</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Z</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示镇静钢;</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">TZ</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示特殊镇静钢,镇静钢可不标符号,即</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Z</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">和</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">TZ</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">都可不标。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Q235-AF</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">A</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">级沸腾钢。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">专门用途的碳素钢,例如桥梁钢、船用钢等,基本上采用碳素结构钢的表示方法,但在钢号最后附加表示用途的字母。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.优质碳素结构钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号开头的两位数字表示钢的碳含量,以平均碳含量的万分之几表示,例如平均碳含量为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.45%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">的钢,钢号为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“45”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,它不是顺序号,所以不能读成</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">45</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">号钢。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">锰含量较高的优质碳素结构钢,应将锰元素标出,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">50Mn</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">&nbsp; <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">沸腾钢、半镇静钢及专门用途的优质碳素结构钢应在钢号最后特别标出,例如平均碳含量为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.1%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">的半镇静钢,其钢号为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">10b</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.碳素工具钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号冠以</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“T”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,以免与其它钢类相混。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号中的数字表示碳含量,以平均碳含量的千分之几表示。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“T8”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示平均碳含量为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.8%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">锰含量较高者,在钢号最后标出</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Mn”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“T8Mn”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">④</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">高级优质碳素工具钢的磷、硫含量,比一般优质碳素工具钢低,在钢号最后加注字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“A”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,以示区别,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“T8MnA”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">4</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.易切削钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号冠以</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Y”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,以区别于优质碳素结构钢。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Y”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">后的数字表示碳含量,以平均碳含量的万分之几表示,例如平均碳含量为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.3%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">的易切削钢,其钢号为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Y30”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">锰含量较高者,亦在钢号后标出</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Mn”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“Y40Mn”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">5</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.合金结构钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号开头的两位数字表示钢的碳含量,以平均碳含量的万分之几表示,如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">40Cr</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢中主要合金元素,除个别微合金元素外,一般以百分之几表示。当平均合金含量<</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">1.5%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">时,钢号中一般只标出元素符号,而不标明含量,但在特殊情况下易致混淆者,在元素符号后亦可标以数字</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“1”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,例如钢号</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“12CrMoV”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">和</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“12Cr1MoV”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,前者铬含量为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.4-0.6%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,后者为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.9-1.2%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,其余成分全部相同。当合金元素平均含量</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">≥1.5%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">≥2.5%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">≥3.5%……</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">时,在元素符号后面应标明含量,可相应表示为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">4……</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">等。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">18Cr2Ni4WA</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢中的钒</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">V</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、钛</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Ti</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、铝</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">AL</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、硼</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">B</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、稀土</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">RE</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">等合金元素,均属微合金元素,虽然含量很低,仍应在钢号中标出。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">20MnVB</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢中。钒为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.07-0.12%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,硼为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.001-0.005%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">④</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">高级优质钢应在钢号最后加</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“A”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,以区别于一般优质钢。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">⑤</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">专门用途的合金结构钢,钢号冠以(或后缀)代表该钢种用途的符号。例如铆螺专用的</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">30CrMnSi</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢,钢号表示为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">ML30CrMnSi</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P style="MARGIN: 0cm 0cm 0pt" class=MsoNormal><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">6</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.低合金高强度钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号的表示方法,基本上和合金结构钢相同。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">对专业用低合金高强度钢,应在钢号最后标明。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">16Mn</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢,用于桥梁的专用钢种为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“16Mnq”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,汽车大梁的专用钢种为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“16MnL”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,压力容器的专用钢种为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“16MnR”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">&nbsp; <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">7</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.-弹簧</A>钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">&nbsp;</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">弹簧钢按化学成分可分为碳素弹簧钢和合金弹簧钢两类,其钢号表示方法,前者基本上与优质碳素结构钢相同,后者基本上与合金结钢相同。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">8</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.滚动-轴承</A>钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号冠以字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“G”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,表示滚动轴承钢类。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">高碳铬轴承钢钢号的碳含量不标出,铬含量以千分之几表示例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">GCr15</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。渗碳轴承钢的钢号表示方法,基本上和合金结构钢相同。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">9</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.合金工具钢和高速工具钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">合金工具钢钢号的平均碳含量</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">≥1.0%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">时,不标出碳含量;当平均碳含量<</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">1.0%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">时,以千分之几表示。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Cr12</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">CrWMn</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">9SiCr</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">3Cr2W8V</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢中合金元素含量的表示方法,基本上与合金结构钢相同。但对铬含量较低的合金工具钢钢号,其铬含量以千分之几表示,并在表示含量的数字前加</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="0" UnitName="”">0”</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,以便把它和一般元素含量按百分之几表示的方法区别开来。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">Cr06</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">高速工具钢的钢号一般不标出碳含量,只标出各种合金元素平均含量的百分之几。例如钨系高速钢的钢号表示为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“W18Cr4V”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。钢号冠以字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“C”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">者,表示其碳含量高于未冠</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“C”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">的通用钢号。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">10</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.不锈钢和耐热钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号中碳含量以千分之几表示。例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“2Cr<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="13" UnitName="”">13”</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢的平均碳含量为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0.2%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">;若钢中含碳量</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">≤0.03%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">或</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">≤0.08%</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">者</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">,</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号前分别冠以</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="0" UnitName="”">00”</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">及</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="0" UnitName="”">0”</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示之,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">00Cr17Ni14Mo2</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">、</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">0Cr18&nbsp;Ni9</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">等。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">对钢中主要合金元素以百分之几表示,而钛、铌、锆、氮</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">……</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">等则按上述合金结构钢对微合金元素的表示方法标出。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">11</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.焊条钢它的钢号前冠以字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“H”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,以区别于其它钢类。例如不锈钢焊丝为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“H2Cr<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="13" UnitName="”">13”</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">,可以区别于不锈钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“2Cr<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="13" UnitName="”">13”</st1:chmetcnv></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">12</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.电工用硅钢</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号由字母和数字组成。钢号头部字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">DR</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示电工用热轧硅钢,</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">DW</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示电工用冷轧无取向硅钢,</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">DQ</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示电工用冷轧取向硅钢。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">字母之后的数字表示铁损值(</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">W/kg</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">)的</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">100</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">倍。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">③</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">钢号尾部加字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“G”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">者,表示在高频率下检验的;未加</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“G”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">者,表示在频率为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">50</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">周波下检验的。例如钢号</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">DW470</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示电工用冷轧无取向硅钢产品在</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">50</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">赫频率时的最大单位重量铁损值为</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">4.7W/kg</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">13</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">.电工用纯铁</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">①</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">它的牌号由字母</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“DT”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">和数字组成,</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">“DT”</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">表示电工用纯铁,数字表示不同牌号的顺序号,例如</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman">DT3</FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">。</SPAN><SPAN style="FONT-FAMILY: ˎ̥; COLOR: #505050; FONT-SIZE: 9.5pt" lang=EN-US><FONT face="Times New Roman"> <BR></FONT></SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-ascii-font-family: ˎ̥; mso-hansi-font-family: ˎ̥">  </SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #505050; FONT-SIZE: 9.5pt; mso-bidi-font-family: 宋体">②</SPAN><SPAN style="FONT-FAMILY: 宋体; COLOR: #50
               
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