Chemical Composition and Hardness Requirements in ASTM A 532/A 532M-93a Standard Specification for Wear-Resistant Cast Iron

High-chromium white cast iron combines exceptional wear resistance with reasonable toughness. Currently, it is widely used in dry grinding processes, coal mills, cement mills, and other high-wear, low-impact applications—thanks to its significantly longer service life compared to materials like high-manganese steel and chromium-molybdenum alloy steel.

ASTM A 532/A 532M-93a, the Standard Specification for Wear-Resistant Cast Iron, covers a range of white cast irons that have been alloyed to ensure exceptional wear resistance in applications across industries such as mining, milling, earthmoving, and manufacturing. The specification provides detailed guidance on manufacturing methods, heat treatment, chemical composition requirements, microstructural characteristics, hardness testing procedures, and associated standards. Tables 1 and 2 outline the specific chemical composition and hardness requirements, respectively.