This European Standard defines the grades of abrasion resistant white cast irons. It specifies the grades in terms of: - chemical composition; - hardness. The types of abrasion resistant white cast irons covered by this standard are: a) unalloyed or low alloy cast irons; b) nickel-chromium cast irons covering two general types: - 4 % Ni 2 % Cr cast irons; - 9 % Cr 5 % Ni cast irons; c) high chromium cast irons covering four ranges of chromium content: - 11 % <- Cr =14 %; - 14 % <- Cr =18 %; - 18 % <- Cr =23 %; - 23 % <- Cr =28 %; and for each chromium content range, three ranges of carbon content.