Material Name: Alloy structural steel
Grade: 5150
Standard: ASTM A29 / A29M-04
● Features and Scope:
Normalizing, quenching and tempering, annealing after machinability good; good hardenability; during cold plastic deformation is low, good weldability. Is used by heavy-duty parts and friction, such as hot roll, gear shafts, gears, clutch gear tractor, diesel engine connecting rod bolts, high strength and wear-resistant gear heavy mining machinery, oil film bearing sleeve and moderate elasticity of spring .
● Chemical Composition:
Carbon C: 0.47 ~ 0.54
Si Si: 0.17 ~ 0.37
Mn Mn: 0.50 ~ 0.80
Sulfur S: to allow the residual content ≤0.035
Phosphorus P: to allow the residual content ≤0.035
Chromium Cr: 0.80 ~ 1.10
Ni: to allow the residual content ≤0.030
Cu: to allow the residual content ≤0.030
● Mechanical Properties:
Tensile strength σb (MPa): ≥1080 (110)
Yield strength σs (MPa): ≥930 (95)
Elongation δ5 (%): ≥9
Reduction of area ψ (%): ≥40
Impact energy Akv (J): ≥39
Impact toughness αkv (J / cm2): ≥49 (5)
Hardness: ≤229HB
Sample size: Sample size is 25mm rough
● Heat treatment and microstructure specifications:
Heat treatment specifications: quenching 830 ℃, oil cooling; tempering 520 ℃, water, oil cooling.
● Delivery status: to heat treatment (normalizing, annealing or tempering) or without heat treatment delivery, the delivery status should be specified in the contract.