| Quantity: | |
|---|---|
CHEMICAL COMPOSITION
C: 0.13-0.18
Si: 0.15-0.35
Mn: 0.60-0.85
P: ≦0.03
S: ≦0.03
Ni: ≦0.25
Cr: 0.9-1.2
Mo: 0.15-0.30
Cu: ≦0.3
MECHANICAL PROPERTIES
Tensile strength (kgf/mm²): ≥85
Elongation (%): ≥16
Cross section reduction rate (%): ≥40
Impact value (J/cm2): ≥7
Hardness (Hb) : 235-321
PHYSICAL PROPERTIES
Density: 7.85g/cm3
Elastic modulus: 200GPa
Thermal expansion coefficient: 12.2 x10(-6)/°C
Thermal conductivity: 46.6W//(m·K)
Conductivity: 49.8MS/mm
HEAT TREATMENT
Annealing: 850℃ Furnace Cooling
Normalization: 850-900℃ Air Cooling
Hardening: 850-900℃ 1st Oil Cooling, 800-850℃ 2rd Oil Cooling
Tempering: 150-200℃ Air Cooling
CHEMICAL COMPOSITION
C: 0.13-0.18
Si: 0.15-0.35
Mn: 0.60-0.85
P: ≦0.03
S: ≦0.03
Ni: ≦0.25
Cr: 0.9-1.2
Mo: 0.15-0.30
Cu: ≦0.3
MECHANICAL PROPERTIES
Tensile strength (kgf/mm²): ≥85
Elongation (%): ≥16
Cross section reduction rate (%): ≥40
Impact value (J/cm2): ≥7
Hardness (Hb) : 235-321
PHYSICAL PROPERTIES
Density: 7.85g/cm3
Elastic modulus: 200GPa
Thermal expansion coefficient: 12.2 x10(-6)/°C
Thermal conductivity: 46.6W//(m·K)
Conductivity: 49.8MS/mm
HEAT TREATMENT
Annealing: 850℃ Furnace Cooling
Normalization: 850-900℃ Air Cooling
Hardening: 850-900℃ 1st Oil Cooling, 800-850℃ 2rd Oil Cooling
Tempering: 150-200℃ Air Cooling
