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SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

    Buy cheap SNCM439 / SAE4340 / 40CrNiMoa  Alloy Steel Round Bar Forged 80mm Dia from wholesalers
     
    Buy cheap SNCM439 / SAE4340 / 40CrNiMoa  Alloy Steel Round Bar Forged 80mm Dia from wholesalers
    • Buy cheap SNCM439 / SAE4340 / 40CrNiMoa  Alloy Steel Round Bar Forged 80mm Dia from wholesalers
    • Buy cheap SNCM439 / SAE4340 / 40CrNiMoa  Alloy Steel Round Bar Forged 80mm Dia from wholesalers

    SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

    Ask Lasest Price
    Brand Name : Mittel
    Model Number : SAE 4340
    Certification : SGS ISO MTC
    Price : 1.65USD/KG
    Payment Terms : L/C, T/T
    Supply Ability : 80000KGS
    Delivery Time : 7 Working Days
    • Product Details
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    SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia

    NCM439/4340/40CrNiMo Round Steel Bar
    34CrNiMo6 / 1.6582 / 4340 / SNCM439 Alloy Steel Bar Round for Axle, Gear, Fastener
    Equivalence
    AISI / SAEDIN / W.NrJISGB
    434034CrNiMo6
    1.6582
    SNCM43940CrNiMoA
    Chemical Composition (%)
    Steel GradeCSiMnPSCrMoNi
    34CrNiMo6
    1.6582
    0.30
    0.38

    0.40
    0.50
    0.80

    0.035

    0.035
    1.30
    1.70
    0.15
    0.30
    1.30
    1.70
    43400.38
    0.43
    0.15
    0.35
    0.60
    0.80

    0.035

    0.040
    0.70
    0.90
    0.20
    0.30
    1.65
    2.00
    SNCM4390.36
    0.43
    0.15
    0.35
    0.60
    0.90

    0.030

    0.030
    0.60
    1.00
    0.15
    0.30
    1.60
    2.00
    Dimensions
    Hot RolledForgedCold Drawn
    Diameter (mm)10-260150-15002.5-70
    Length (mm)4000-100003000-100004000-10000
    Delivery Condition
    EAF+LF+VD, Hot rolled, Forged or Cold drawn, Black surface or Machined surface (Peeled, Turned, Grinded), Annealed or Q+T, UT 100% Passed
    mechnical data

    40CrNiMoA Alloy Steel Mechanical Properties

    • Yield strength: ≥ 835 MPa
    • Tensile strength: ≥ 980 MPa
    • Elongation: ≥12%
    • Rate of reduction in area: ≥55%
    • Impact absorbing energy: ≥ 78 J
    • Material Brinell Hardness: ≤ 269 (Annealed or high temperature tempered steel rod)
    • Sample size: 25mm

    Heat treatment specification

    • First quenching heating temperature: 850 °C (Quenchant– oil)
    • Tempering heating temperature: 600 °C (Quenchant– water, oil)

    It was used where require high tensile and good wear-resistance property parts such as heavy-duty axles, shafts, heavy-duty gears, spindles, pins, studs, bolts, couplings, sprockets, pinions, torsion bars, connecting rods. These high tensile alloy steel has been widely used in the areas such as petrol chemical industry, automotive, steam power equipment and other high temperature services.


    Characteristics
    It is a low-alloy steel containing chromium and molybdenum and nickel as strengthening agents. The steel has good strength and toughness, hardenability and overheat resistance stability, also high susceptibility of flake formation and temper brittleness. Its poor weldability requires high temperature preheating and stress relieving, before and after process. It should be Hardened and tempered before application.
    Applications
    This low-alloy steel finds many applications where high strength, plasticity required such as large and important parts requiring hardening and tempering as heavy load axle for heavy machinery, axle with diameter over 250mm for steam turbine, axle of rotor wing for helicopter, axle of turbo and turbine blade and heavy load transmission part for jet engine, fasteners and gear for crank axle. It’s also used for rotor spindle and blade where temperature over 400℃. It can be used as important part with special properties after nitriding and ultrahigh strength steel after low tempering isothermal quenching.

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