C | Mn | Si | Cr | Ni | Mo |
≤0.02 | ≤1.0 | ≤0.2 | 14.5~16.5 | ≥50.0 | 15.0~17.0 |
W | Co | Fe | S | P | 其他元素總量 |
3.0~4.5 | ≤2.5 | 4.0~7.0 | ≤0.015 | ≤0.020 | ≤0.5 |
試驗(yàn)項(xiàng)目 | Rm/MPa | Rel/Mpa | A(%) |
保證值 | ≥690 | ≥400 | ≥22 |
焊條直徑/mm | 2.5 | 3.2 | 4.0 |
焊接電流/A | 60~90 | 70~110 | 90~150 |