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Corrosion Performance Of High Chrome White Iron Castings

  • Member since Mar 19 5
    Corrosion Performance Of High Chrome White Iron Castings

    ASTM A532 Class III Type A
    The 25% Cr alloy is the most common High Chrome White Iron Castings poured. This alloy has great abrasion resistant properties especially against gouging, grinding and scratching. 25% Cr material can be machined to meet tighter tolerances like those found in pump and piping type castings. Castings poured in this alloy can be softened and easily machined by Penticton Foundry. This 25% Cr alloy is a hypoeutectic structure consisting of very hard primary and secondary carbides in a matrix of martensite.

    Applications
    This alloy meets the requirements for many applications such as mining crusher liners, chute liners, ball mill liners (and lifter bars), slurry pumps, frac pumps, dredge pumps, impellers, oil sands applications, concrete rock crushing and recycling-machine parts (blowbars).

    Designing
    The 25% Cr alloy has an inconsistent tensile strength. For design questions please contact Penticton Foundry.

    Corrosion Properties
    The 25% Cr alloy has good corrosion resistance for the majority of slurries it will be exposed to. In severe applications (like flue gas desulfurization) consider using a 28% - 30% Cr alloy.

    Processing

    Casting section thicknesses of 8 inches (200mm) are common.
    Full through-hardness can be obtained in 8 inch sections via alloying and heat treatment.
    Penticton Foundry can offer machining of 25% Cr.
    Welding is not recommended on 25% Cr.

      April 10, 2019 8:56 PM MDT
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