| Quantity: | |
|---|---|
CHEMICAL COMPOSITION
C: 0.51-0.59
Si: 1.20-1.60
Mn: 0.50-0.80
P: ≤0.025
S: ≤0.025
Cr: 0.50-0.80
MECHANICAL PROPERTIES
Tensile strength: 1450~1750 MPa
Yield point: ≥1300 MPa
Elongation after fracture: ≥6%
Shrinkage rate: >25%
Hardness: ≤280 HBW
PHYSICAL PROPERTIES
Density: 7.85g/cm³
Melting point: 1420℃
Coefficient of thermal expansion: 11.5×10^-6/℃
HEAT TREATMENT
Quenching: 860°C±10°C. Oil cooling is usually used after quenching to quickly reduce the temperature, which helps to improve the hardness and strength of the material.
Tempering: Tempering treatment is required after quenching to optimize its hardness and toughness. The tempering temperature is generally 450°C±10°C, which helps to reduce the internal stress generated during quenching and can adjust the hardness and elasticity of the material.
FORGING
Heating temperature: 1050-850°C
Forging temperature: ≥840°C
Cooling method: Cooling after forging can be air cooling to 850-880°C, followed by air cooling, or oil quenching at min. 840°C.
Annealing treatment: 375-500°C, and usually air cooling.
CHEMICAL COMPOSITION
C: 0.51-0.59
Si: 1.20-1.60
Mn: 0.50-0.80
P: ≤0.025
S: ≤0.025
Cr: 0.50-0.80
MECHANICAL PROPERTIES
Tensile strength: 1450~1750 MPa
Yield point: ≥1300 MPa
Elongation after fracture: ≥6%
Shrinkage rate: >25%
Hardness: ≤280 HBW
PHYSICAL PROPERTIES
Density: 7.85g/cm³
Melting point: 1420℃
Coefficient of thermal expansion: 11.5×10^-6/℃
HEAT TREATMENT
Quenching: 860°C±10°C. Oil cooling is usually used after quenching to quickly reduce the temperature, which helps to improve the hardness and strength of the material.
Tempering: Tempering treatment is required after quenching to optimize its hardness and toughness. The tempering temperature is generally 450°C±10°C, which helps to reduce the internal stress generated during quenching and can adjust the hardness and elasticity of the material.
FORGING
Heating temperature: 1050-850°C
Forging temperature: ≥840°C
Cooling method: Cooling after forging can be air cooling to 850-880°C, followed by air cooling, or oil quenching at min. 840°C.
Annealing treatment: 375-500°C, and usually air cooling.
