4330 MOD ALLOY STEEL

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  • Description

    4330 steel is a medium-carbon alloy known for its excellent strength, toughness, and versatility, particularly in demanding applications like aerospace and automotive. It is characterized by its alloying elements such as chromium, nickel, and molybdenum, which enhance its hardenability, corrosion resistance, and mechanical performance. The steel exhibits high tensile strength, good ductility, and excellent fatigue resistance, making it suitable for high-stress applications. 4330 steel is also used in oil and gas drilling equipment and hydraulic fracturing tools, where it provides high strength and corrosion resistance.

  • Identification | Specifications

    GNS # J24045
    AISI # 4330

    AMS 6411
    AMS 6427
    BMS 7-122

  • Properties

    Physical
    Specific Gravity - .783
    Density - 0.2836 lb/in³

    Mechanical
    Hardness – Rockwell C – Max 89

  • Processes

    Standard
    Hot Rolled Only
    ‍Normalized, Sub Critical Anneal
    Flattened
    Descaled
    Cut Ends

  • Chemistry

    Carbon 0.28 – 0.33%

    Chromium 0.75 – 1.00%

    Copper 0.35%

    Manganese 0.75 Min – 1.00% Max

    Molybdenum 0.35% – 0.50%

    Nickel  1.65% – 2.00%

    Phosphorus 0.025% Max

    Silicon  0.15% – 0.35%

    Sulfur 0.025% Max

    Vanadium 0.05% – 0.10%