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CHEMICAL COMPOSITION
C: 0.17-0.22
Si: ≤ 0.4
Mn: 1.1-1.4
P: ≤ 0.025
S: 0.02-0.04
Cr: 1.0-1.3
MECHANICAL PROPERTIES
Tensile strength: ≥ 850MPa
Yield strength: ≥ 700MPa
Elongation: ≥ 12%
Hardness: ≤ 217HB
Toughness: Good
HEAT TREATMENT
Normalizing,°C: 840-870
Annealing,°C: 650-700
Carburizing,°C: 880-980
Core Hardening,°C: 860-900
Case Hardening,°C: 780-820
Tempering,°C: 150-200
CHEMICAL COMPOSITION
C: 0.17-0.22
Si: ≤ 0.4
Mn: 1.1-1.4
P: ≤ 0.025
S: 0.02-0.04
Cr: 1.0-1.3
MECHANICAL PROPERTIES
Tensile strength: ≥ 850MPa
Yield strength: ≥ 700MPa
Elongation: ≥ 12%
Hardness: ≤ 217HB
Toughness: Good
HEAT TREATMENT
Normalizing,°C: 840-870
Annealing,°C: 650-700
Carburizing,°C: 880-980
Core Hardening,°C: 860-900
Case Hardening,°C: 780-820
Tempering,°C: 150-200