• GB/T 3077 42CrMo4 alloy steel
  • Hardness: <=217HBW
    Thermal processing Temperature1050-850
    Heat Treatment: Annealed: 680-720°C
    Normalized: 840-880°C
    Quenched: 820-850°Cfor water, 830-860°C for oil
    Tempered: 540-680°C

    42CrMo4 alloy steel Chemical composition %:

    C

    Si

    Mn

    P

    S

    Cr

    Mo

    0.38- 0.45

    max   0.4

    0.6 - 0.9

    max   0.025

    max   0.035

    0.9 - 1.2

    0.15 - 0.3

    GB/T 3077 42CrMo4 Mechanical properties:

    Yield
    Rp0.2 (MPa)

    Tensile
    Rm (MPa)

    Impact
    KV/Ku (J)

    Elongation
    A (%)

    252 (≥)

    877 (≥)

    24

    14

    GB/T 3077 42CrMo4 Applications:
    To manufacture high strength and conditioning section part that request more than 35CrMo, such as locomotive traction gear, supercharger gear. Connecting rod and spring clip, can also be used for oil drill pipe joints below 2000m deep.

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