| Quantity: | |
|---|---|
CHEMICAL COMPOSITION
C: 0.46-0.54
Si: 0.17-0.37
Mn: 0.50-0.80
P: ≤0.030
S: ≤0.030
Cr: 0.80-1.10
Ni: ≤0.35
Cu: ≤0.25
V: 0.10-0.20
MECHANICAL PROPERTIES
Tensile Strength σb (MPa): ≥ 1274 (130)
Yield Strength σ0.2 (MPa): ≥1127 (115)
Elongation δ5 (%): ≥ 10
Reduction of area ψ (%): ≥25
Hardness: ≤280HB
HEAT TREATMENT
Thermal processing temperature: 1100-850℃
Annealing temperature: 680-720℃
Normalizing temperature: 870-900℃
Quenching temperature: 820-850℃ (water quenching) or 830-860℃ (oil quenching)
Tempering temperature: 480-650℃
Surface hardening treatment temperature: 840-870℃, surface hardness HBC is not greater than 57-62
FORGING
Preheat carefully, then raise temperature to 1050°C for forging. Do not forge below 840°C. After forging cool slowly in a furnace.
CHEMICAL COMPOSITION
C: 0.46-0.54
Si: 0.17-0.37
Mn: 0.50-0.80
P: ≤0.030
S: ≤0.030
Cr: 0.80-1.10
Ni: ≤0.35
Cu: ≤0.25
V: 0.10-0.20
MECHANICAL PROPERTIES
Tensile Strength σb (MPa): ≥ 1274 (130)
Yield Strength σ0.2 (MPa): ≥1127 (115)
Elongation δ5 (%): ≥ 10
Reduction of area ψ (%): ≥25
Hardness: ≤280HB
HEAT TREATMENT
Thermal processing temperature: 1100-850℃
Annealing temperature: 680-720℃
Normalizing temperature: 870-900℃
Quenching temperature: 820-850℃ (water quenching) or 830-860℃ (oil quenching)
Tempering temperature: 480-650℃
Surface hardening treatment temperature: 840-870℃, surface hardness HBC is not greater than 57-62
FORGING
Preheat carefully, then raise temperature to 1050°C for forging. Do not forge below 840°C. After forging cool slowly in a furnace.
