C

Si

Mn

Cr

Ni

Mo

Cu

σ b Mpa

σ 0.2
Mpa

δ %

≤ 0.03

≤ 0.65

1.0~2.5

20.0~23.0

25.0~28.0

4.5~6.0

≤ 2.0

≥ 510

≥ 320

≥ 25

C

Si

Mn

Cr

Ni

N

σ b
Mpa

σ 0.2
Mpa

δ %

≤ 0.08

≤ 0.65

1.0~2.5

19.0~21.5

9.0~11.0

10XC%~1.0

≥ 550

≥ 350

≥ 25

C

Si

Mn

Cr

Ni

Mo

σ b Mpa

σ 0.2Mpa

δ %

≤ 0.03

≤ 0.65

1.0~2.5

18.5~20.5

13.0~15.0

3.0~4.0

≥ 550

≥ 350

≥ 25