C
|
Si
|
Mn
|
Fe
|
2-4
|
2.5-6.5
|
≤0.75
|
余
|
C
|
Si
|
Mn
|
Fe
|
Ni
|
≤2.0
|
≤2.50
|
≤1.0
|
≤8.0
|
≥90
|
抗拉强度σb/MPa
|
硬度HB
|
240-390
|
120-170
|
C
|
Si
|
Mn
|
Fe
|
Ni
|
≤2.0
|
≤2.50
|
≤1.8
|
余量
|
45-60
|
抗拉强度σb/MPa
|
硬度HB
|
390-540
|
150-210
|
C
|
Si
|
Mn
|
Fe
|
Ni
|
Cu
|
≤1.0
|
≤0.8
|
≤2.5
|
≤6.0
|
45-60
|
24-35
|
抗拉强度σb/MPa
|
硬度HB
|
Tel:
Tel:
Tel:
Tel: