美国标准承压零件用合金铸钢的力学性能与热处理
<TABLE width=748 border=1><TBODY>
<TR>
<TD colSpan=2>
<DIV align=center>钢 号</DIV></TD>
<TD colSpan=4>
<DIV align=center>力学性能（不小于）</DIV></TD>
<TD rowSpan=2>
<DIV align=center>正火温度<BR>/℃</DIV></TD>
<TD colSpan=2>
<DIV align=center>回 火 </DIV></TD>
<TD rowSpan=2>最低预热<BR>温度/℃</TD></TR>
<TR>
<TD>ASTM</TD>
<TD>UNS</TD>
<TD noWrap>
<P align=center>σ<SUB>b</SUB>/MPa</P></TD>
<TD noWrap>
<P align=center>σ<SUB>s</SUB>/MPa</P></TD>
<TD noWrap>
<P align=center>δ<BR>(%) </P></TD>
<TD>
<P align=center>φ(%) </P></TD>
<TD>温度<BR>/℃ <BR></TD>
<TD>保温时间<BR>/h</TD></TR>
<TR>
<TD>C23</TD>
<TD>J12080</TD>
<TD>483</TD>
<TD>276</TD>
<TD>18.0</TD>
<TD>35.0</TD>
<TD>1010～1065</TD>
<TD>675～730</TD>
<TD>1</TD>
<TD>150</TD></TR>
<TR>
<TD>C24</TD>
<TD>J12092</TD>
<TD>552</TD>
<TD>345</TD>
<TD>15.0</TD>
<TD>35.0</TD>
<TD>1010～1065</TD>
<TD>675～730</TD>
<TD>12</TD>
<TD>150</TD></TR></TBODY></TABLE>
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