| 
 钢号  | 
 化学成分,%  | 
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| 
 C  | 
 Si  | 
 Mn  | 
 Mo  | 
 Cr  | 
 V  | 
 Nb  | 
 P  | 
 S  | 
 Ni  | 
 Cu  | 
|
| 
 ≤  | 
|||||||||||
| 
 20  | 
 0.17~ 0.23  | 
 0.17~ 0.37  | 
 0.60~ 1.00  | 
 --  | 
 ≤0.25  | 
 --  | 
 --  | 
 0.030  | 
 0.020  | 
 0.25  | 
 0.25  | 
| 
 35  | 
 0.32~ 0.38  | 
 0.17~ 0.37  | 
 0.50~ 0.80  | 
 --  | 
 ≤0.25  | 
 --  | 
 --  | 
 0.030  | 
 0.020  | 
 0.25  | 
 0.25  | 
| 
 16 Mn  | 
 0.13~ 0.19  | 
 0.20~ 0.60  | 
 1.20~ 1.60  | 
 --  | 
 ≤ 0.30  | 
 --  | 
 --  | 
 0.030  | 
 0.020  | 
 0.30  | 
 0.25  | 
| 
 20 Mn Mo  | 
 0.17~ 0.23  | 
 0.17~ 0.37  | 
 1.10~ 1.40  | 
 0.20~ 0.35  | 
 ≤ 0.30  | 
 --  | 
 --  | 
 0.025  | 
 0.015  | 
 0.30  | 
 0.25  | 
| 
 20 Mn Mo Nb  | 
 0.17~ 0.23  | 
 0.17~ 0.37  | 
 1.30~ 1.60  | 
 0.45~ 0.65  | 
 ≤ 0.30  | 
 --  | 
 0.025~ 0.050  | 
 0.025  | 
 0.015  | 
 0.30  | 
 0.25  | 
| 
 15 Cr Mo  | 
 0.12~ 0.18  | 
 0.10~ 0.60  | 
 0.30~ 0.80  | 
 0.45~ 0.65  | 
 0.80~ 1.25  | 
 --  | 
 --  | 
 0.030  | 
 0.020  | 
 0.30  | 
 0.25  | 
| 
 35 Cr Mo  | 
 0.32~ 0.38  | 
 0.17~ 0.37  | 
 0.40~ 0.70  | 
 0.15~ 0.25  | 
 0.80~ 1.10  | 
 --  | 
 --  | 
 0.030  | 
 0.020  | 
 0.30  | 
 0.25  | 
| 
 12 Cr 1Mo V  | 
 0.09~ 0.15  | 
 0.17~ 0.37  | 
 0.40~ 0.70  | 
 0.25~ 0.35  | 
 0.90~ 1.20  | 
 0.15~ 0.30  | 
 --  | 
 0.030  | 
 0.020  | 
 0.30  | 
 0.25  | 
| 
 14 Cr 1Mo  | 
 0.11~ 0.17  | 
 0.50~ 0.80  | 
 0.30~ 0.80  | 
 0.45~ 0.65  | 
 1.15~ 1.50  | 
 --  | 
 --  | 
 0.025  | 
 0.015  | 
 0.30  | 
 0.25  | 
| 
 12 Cr 2Mo 1  | 
 ≤0.15  | 
 ≤0.50  | 
 0.30~ 0.60  | 
 0.90~ 1.10  | 
 2.00~ 2.50  | 
 --  | 
 --  | 
 0.025  | 
 0.015  | 
 0.30  | 
 0.25  | 
| 
 1 Cr 5Mo  | 
 ≤0.15  | 
 ≤0.50  | 
 ≤0.60  | 
 0.45~ 0.65  | 
 4.00~ 6.00  | 
 --  | 
 --  | 
 0.030  | 
 0.020  | 
 0.50  | 
 0.25  | 
| 
   注:对真空碳脱氧钢,允许Si含量小于或等于0.12%。  | 
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