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CHEMICAL COMPOSITION
C: 0.57-0.65
Si: ≤0.40
Mn: 0.60-0.90
P: ≤0.035
S: 0.020-0.040
Cr: ≤ 0.40
Ni: ≤ 0.40
Mo: ≤ 0.10
Cr+Ni+Mo: ≤ 0.63
MECHANICAL PROPERTIES
Young's modulus: 200000MPa
Tensile strength: 650-880MPa
Elongation: 8-25%
Fatigue: 275MPa
Yield strength: 350-550MPa
HEAT TREATMENT
Soft Annealing:Heat to 650-700oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 241.
Normalizing:Normalizing temperature: 820-850oC.
Hardening:Harden from a temperature of 800-830oC, 810-840oC followed by water or oil quenching.
Tempering:Tempering temperature: 540-680oC.
CHEMICAL COMPOSITION
C: 0.57-0.65
Si: ≤0.40
Mn: 0.60-0.90
P: ≤0.035
S: 0.020-0.040
Cr: ≤ 0.40
Ni: ≤ 0.40
Mo: ≤ 0.10
Cr+Ni+Mo: ≤ 0.63
MECHANICAL PROPERTIES
Young's modulus: 200000MPa
Tensile strength: 650-880MPa
Elongation: 8-25%
Fatigue: 275MPa
Yield strength: 350-550MPa
HEAT TREATMENT
Soft Annealing:Heat to 650-700oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 241.
Normalizing:Normalizing temperature: 820-850oC.
Hardening:Harden from a temperature of 800-830oC, 810-840oC followed by water or oil quenching.
Tempering:Tempering temperature: 540-680oC.