| Quantity: | |
|---|---|
CHEMICAL COMPOSITION
C: 0.35-0.43
Si: 0.1-0.4
Mn: 0.5-0.8
P: ≤0.025
S: ≤0.035
Cr: 0.6-1.0
Ni: 0.7-1.0
Mo: 0.15-0.25
MECHANICAL PROPERTIES
Yield point: < 740 MPa
Tensile strength: > 880 MPa
Contraction: -
Notch toughness: > 80 J
Elongation: > 12 %
Density: ~7,85 kg/dm3
Hardness in softened state: < 229 HB
HEAT TREATMENT
Soft Annealing: 650 – 690°C,Cooling in furnace,hardness below 240 HBW
Normalizing: 860-880°C,air cooling
Quenching: 830-850°C,Medium:Water,Oil
Tempering: 540-630°C
Ac1: 740℃
Ac3: 790℃
Ms: 330℃
FORGING
Initial Forging Temperature：1150℃
Final Forging Temperature：850℃
Forging Ratio：above 4:1
CHEMICAL COMPOSITION
C: 0.35-0.43
Si: 0.1-0.4
Mn: 0.5-0.8
P: ≤0.025
S: ≤0.035
Cr: 0.6-1.0
Ni: 0.7-1.0
Mo: 0.15-0.25
MECHANICAL PROPERTIES
Yield point: < 740 MPa
Tensile strength: > 880 MPa
Contraction: -
Notch toughness: > 80 J
Elongation: > 12 %
Density: ~7,85 kg/dm3
Hardness in softened state: < 229 HB
HEAT TREATMENT
Soft Annealing: 650 – 690°C,Cooling in furnace,hardness below 240 HBW
Normalizing: 860-880°C,air cooling
Quenching: 830-850°C,Medium:Water,Oil
Tempering: 540-630°C
Ac1: 740℃
Ac3: 790℃
Ms: 330℃
FORGING
Initial Forging Temperature：1150℃
Final Forging Temperature：850℃
Forging Ratio：above 4:1
