A8 TOOL STEEL

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  • Description

    A8 steel, also known as WM A8, is a medium-carbon, air-hardening tool steel characterized by its excellent toughness and moderate wear resistance. It is commonly used in applications such as cuts, punches, and dies due to its ability to maintain a sharp cutting edge and resist deformation under high stress. Offers good toughness, making it suitable for precision tooling. Enhanced by chromium, providing better corrosion resistance compared to lower-carbon steels. A8 steel is known for its dimensional stability during heat treatment, which is crucial for maintaining its mechanical properties over time. A8 steel is often preferred over lower-carbon steels like D2 for applications requiring higher toughness and wear resistance.

  • Identification | Specifications

    UNS # T30108
    AISI # A8

    ASTM A681

  • Properties

    Physical
    Specific Gravity - 7.85
    Density - 0.284 lb/in³

  • Processes

    Standard
    Hot Rolled
    Annealed
    Flattened
    Cut Ends

  • Chemistry

    Carbon 0.50% – 0.60%

    Chromium 4.75% – 5.50%

    Manganese 0.20% – 0.50%

    Molybdenum 1.15% – 1.65%

    Phosphorus 0.030% Max

    Silicon 0.75% – 1.10%

    Sulfur 0.030% Max

    Tungsten 1% - 1.50%