C | Si | Mn | P | S | Cr | Mo | V | Nb | Cu | Ti | Ni | N | Al |
≤0.2 | ≤0.6 |
1 -1.7 |
≤0.03 | ≤0.03 | ≤0.3 | ≤0.1 |
0.01 -0.2 |
0.01- 0.05 |
≤0.4 |
0.006 -0.05 |
≤0.8 | ≤0.015 | ≥0.015 |
牌号 | 碳当量CEV | |||
公称厚度或直径/mm | ||||
≤63 | >63-100 | >100-250 | >250-400 | |
Q420NC | 0.48 | 0.5 | 0.52 | 协议 |
牌号 | 屈服强度 | 抗拉强度 | 延伸率% |
Q420NC | ≥420Mpa | 520-680Mpa | ≥19 |