厚度mm | C | Si | Mn | P | S | Cr | Ni | Mo | B | CEV | CET |
4-12 | ≤0.18 | ≤0.5 | ≤1.5 | ≤0.025 | ≤0.01 | ≤0.4 | ≤0.1 | ≤0.2 | ≤0.004 | ≤0.36 | ≤0.25 |
12.1-25 | ≤0.2 | ≤0.5 | ≤1.5 | ≤0.025 | ≤0.01 | ≤0.6 | ≤0.15 | ≤0.25 | ≤0.004 | ≤0.45 | ≤0.29 |
25.1-35 | ≤0.2 | ≤0.6 | ≤1.5 | ≤0.025 | ≤0.01 | ≤1 | ≤0.2 | ≤0.35 | ≤0.004 | ≤0.52 | ≤0.31 |
35.1-50 | ≤0.21 | ≤0.7 | ≤1.5 | ≤0.025 | ≤0.01 | ≤1.2 | ≤0.25 | ≤0.5 | ≤0.004 | ≤0.6 | ≤0.34 |