C | Mn | Si | Cr | Ni | Mo |
≤0.10 | ≤2.0 | ≤0.8 | 20.0~23.0 | ≥55.0 | 8.0~10.0 |
Fe | Cu | Nb+Ta | S | P | 其他元素總量 |
≤7.0 | ≤0.5 | 3.0~4.2 | ≤0.015 | ≤0.020 | ≤0.5 |
試驗(yàn)項(xiàng)目 | Rm/MPa | Rel/Mpa | A(%) |
保證值 | ≥760 | ≥420 | ≥27 |
焊條直徑/mm | 2.5 | 3.2 | 4.0 |
焊接電流/A | 50~70 | 80~100 | 110~150 |