| 钢类 | 等级 | 化学成分(%) | ||||||||
| C(碳) | Mo(锰) | Si(硅) | P(磷) | S(硫) | AlS(酸溶铝) | Nb(铌) | V(钒) | |||
|
一 般 强 度 钢 |
ABCD | ≤0.22 | ≥2.5C | 0.10-0.35 | ≤0.040 | ≤0.040 | ≥0.015 | — | — | |
| ≤0.21 | 0.60-1.00 | ≥0.015 | — | — | ||||||
| ≤0.21 | 0.60-1.10 | — | — | |||||||
| ≤0.18 | 0.70-1.20 | — | — | |||||||
| — | — | |||||||||
|
高 强 度 钢 |
AH32 | ≤0.18 | 0.70-1.60 | 0.10-0.50 | ≤0.040 | ≤0.040 | ≥0.015 | — | — | |
| DH32 | 0.90-1.60 | — | — | |||||||
| EH32 | 0.90-1.60 | — | — | |||||||
| AH36 | 0.70-1.60 | |||||||||
| DH36 | 0.90-1.60 | |||||||||
| EH36 | 0.90-1.60 | 0.015-0.050 | 0.030-0.10 | |||||||
| 钢类 | 残余元素含量(%) | ||||
| Cu(铜) | Cr(铬) | Ni(镍) | Mo(钼) | ||
| 一般强度钢 | ≤0.35 | ≤0.30 | ≤0.30 | — | |
| 高强度钢 | ≤0.35 | ≤0.20 | ≤0.40 | ≤0.08 | |