GB3531标准 | C | Mn | Si | Ni | Cu | S | P | Cr | Mo | CEV | |
≤0.20 | ≤1.7 | ≤0.55 | ≤0.30 | ≥0.40 | ≤0.030 | ≤0.030 | ≤0.30 | ≤0.20 | 0.40% | ||
材料 | δ = 25 | 0.129 | 1.53 | 0.14 | 0.20 | 0.03 | 0.013 | 0.011 | 0.30 | 0 | 0.40% |
复验 | δ = 25 | 0.125 | 1.42 | 0.13 | 0.15 | 0.026 | 0.005 | 0.015 | 0.25 | / | 0.43% |