鋼類 | 等級 | 化學(xué)成分(%) | ||||||||
C(碳) | Mo(錳) | Si(硅) | P(磷) | S(硫) | AlS(酸溶鋁) | Nb(鈮) | V(釩) | |||
一 般 強 度 鋼 |
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 強 度 鋼 |
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 |
鋼類 | 殘余元素含量(%) | ||||
Cu(銅) | Cr(鉻) | Ni(鎳) | Mo(鉬) | ||
一般強度鋼 | ≤0.35 | ≤0.30 | ≤0.30 | — | |
高強度鋼 | ≤0.35 | ≤0.20 | ≤0.40 | ≤0.08 |