ASTM A532 Class III Type A 25% Cr
Chemical Composition, weight % Carbon: 2.0-3.3 Manganese: 2.0 Max Silicon: 1.5 Max Nickel: 2.5 Max Chromium: 23.0-30.0 Molybdenum: 3.0 Max Copper: 1.2 Max Hardness Requirements As Cast: 46 HRC Min. Hardened: 56 HRC Min.