C

Mn

Si

S

P

Cr

Ni

Nb+Ta

Fe

Mo

≤0.10

≤0.50

≤0.50

≤0.015

≤0.02

20.0~23.0

≥58.0

3.15~4.15

≤5.0

8.0~10.0

焊丝直径/mm

焊接电流/A

焊接电压/V

焊接速度/(mm/min)

3.2

400~450

28~32

600~650