White Iron (White Cast Iron)

Designations: white cast iron · ASTM A532White iron is cast iron in which the carbon is held in hard carbides rather than released as graphite. That is what makes it the hardest material Kormax pours and the standard answer to severe abrasion. The trade-off is brittleness: white irons are chosen for wear life, not for impact resistance or machinability. Which grade suits a job depends on the type of abrasion, the impact loading and the section thickness. Kormax casts nickel-alloyed and high-chromium white irons to ASTM A532.

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Grade Selection

White iron grades — standard, hardness and typical duty
Grade	Standard	Hardness	Chosen for
Ni-Hard	A532 Cl. I Type A	550 HB	Sliding and low-impact abrasion, thinner sections. The lowest-cost route where impact is limited.
Chromium 12	A532 Cl. II Type A	550 HB	Better toughness and corrosion resistance than Ni-Hard at similar hardness — chute and wall liners, pump parts, wet duty.
Chromium 25	A532 Cl. III Type A	650 HB	Highest hardness and best corrosion resistance. Coarse or high-stress abrasion, and heavier sections.