C | Mn | Si | Ni | Mo | Fe | Cu |
≤0.10 | 2.0~4.0 | ≤1.0 | ≥55.0 | 5.0~9.0 | ≤10.0 | ≤0.5 |
Nb+Ta | W | Cr | S | P | 其他元素總量 | |
0.5~2.0 | 1.0~2.0 | 12.0~17.0 | ≤0.015 | ≤0.020 | ≤0.5 |
試驗項目 | Rm/MPa | Rel/Mpa | A(%) |
保證值 | ≥620 | ≥350 | ≥32 |
焊條直徑/mm | 2.5 | 3.2 | 4.0 |
焊接電流/A | 50~70 | 80~100 | 110~150 |