美国标准低温下用铁素体和马氏体铸钢的钢号与化学成分（质量分数）（%）
<TABLE width=748 border=1><TBODY>
<TR>
<TD colSpan=2>钢号</TD>
<TD rowSpan=2>
<DIV align=center>C </DIV></TD>
<TD rowSpan=2>
<DIV align=center>Si </DIV></TD>
<TD rowSpan=2>
<DIV align=center>Mn </DIV></TD>
<TD rowSpan=2>
<DIV align=center>P </DIV>
<P align=center>≤ </P></TD>
<TD rowSpan=2>
<DIV align=center>S </DIV>
<P align=center>≤ </P></TD>
<TD rowSpan=2>
<DIV align=center>Cr </DIV></TD>
<TD rowSpan=2>
<DIV align=center>Ni </DIV></TD>
<TD rowSpan=2>
<DIV align=center>Mo </DIV></TD>
<TD rowSpan=2>其他</TD></TR>
<TR>
<TD>ASTM</TD>
<TD>UNS</TD></TR>
<TR>
<TD>A1Q</TD>
<TD> </TD>
<TD>≤0.30</TD>
<TD>≤0.30</TD>
<TD>≤1.00</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>—</TD>
<TD>—</TD>
<TD>—</TD>
<TD>①</TD></TR>
<TR>
<TD>A2Q</TD>
<TD>J02503</TD>
<TD>≤0.26</TD>
<TD>≤0.26</TD>
<TD>≤1.20</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>—</TD>
<TD>—</TD>
<TD>—</TD>
<TD>①</TD></TR>
<TR>
<TD>B2N，B2Q</TD>
<TD>J22501</TD>
<TD>≤0.25</TD>
<TD>≤0.25</TD>
<TD>0.50～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>—</TD>
<TD>2.0～3.0</TD>
<TD>—</TD>
<TD>①</TD></TR>
<TR>
<TD>B3N，B3Q</TD>
<TD>J31500</TD>
<TD>≤0.15</TD>
<TD>≤0.15</TD>
<TD>0.50～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>—</TD>
<TD>3.0～4.0</TD>
<TD>—</TD>
<TD>①</TD></TR>
<TR>
<TD>B4N，B4Q</TD>
<TD>J41501</TD>
<TD>≤0.15</TD>
<TD>≤0.15</TD>
<TD>0.50～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>—</TD>
<TD>4.0～5.0</TD>
<TD>—</TD>
<TD>①</TD></TR>
<TR>
<TD>C1Q</TD>
<TD>J12582</TD>
<TD>≤0.25</TD>
<TD>≤0.25</TD>
<TD>≤1.20</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>—</TD>
<TD>1.5～2.0</TD>
<TD>—</TD>
<TD>①</TD></TR>
<TR>
<TD>D1N1，D1Q1</TD>
<TD>J22092</TD>
<TD>≤0.20</TD>
<TD>≤0.20</TD>
<TD>0.40～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>2.0～2.75</TD>
<TD>—</TD>
<TD>0.15～0.30</TD>
<TD>①</TD></TR>
<TR>
<TD>D1N2，D1Q3</TD>
<TD>J22092</TD>
<TD>≤0.20</TD>
<TD>≤0.20</TD>
<TD>0.40～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>2.0～2.75</TD>
<TD>—</TD>
<TD>0.90～1.20</TD>
<TD>①</TD></TR>
<TR>
<TD>D1N3，D1Q3</TD>
<TD>J22092</TD>
<TD>≤0.20</TD>
<TD>≤0.20</TD>
<TD>0.40～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>2.0～2.75</TD>
<TD>—</TD>
<TD>0.90～1.20</TD>
<TD>①</TD></TR>
<TR>
<TD>E1Q</TD>
<TD>J42220</TD>
<TD>≤0.22</TD>
<TD>≤0.22</TD>
<TD>0.50～0.80</TD>
<TD>0.025</TD>
<TD>0.025</TD>
<TD>1.35～1.85</TD>
<TD>2.5～3.5</TD>
<TD>0.90～1.20</TD>
<TD>①</TD></TR>
<TR>
<TD>E2N，E2Q</TD>
<TD>J42065</TD>
<TD>≤0.20</TD>
<TD>≤0.60</TD>
<TD>0.40～0.70</TD>
<TD>0.020</TD>
<TD>0.020</TD>
<TD>1.5～2.0</TD>
<TD>2.75～3.90</TD>
<TD>0.40～0.60</TD>
<TD>①</TD></TR>
<TR>
<TD>E3N</TD>
<TD>J91500</TD>
<TD>≤0.06</TD>
<TD>≤1.00</TD>
<TD>≤1.00</TD>
<TD>0.030</TD>
<TD>0.030</TD>
<TD>11.5～14.0</TD>
<TD>3.54.5</TD>
<TD>0.40～1.00</TD>
<TD>①</TD></TR></TBODY></TABLE>
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