C | Si | Mn | P | S | Cr | Ni | V | Cu |
0.17 ~ 0.23 |
0.15 ~ 0.40 |
≤ 1.50 |
≤ 0.015 |
≤ 0.010 |
≤ 0.25 |
≤ 1.00 |
≤ 0.05 |
≤ 0.10 |
Rp0.2/MPa | Rm/MPa | A50/% | 0℃AKV/J |
≥450 | 600-780 | ≥18 | ≥34 |