ASTM A942-95(2001) pdf free download.Standard Specification for Centrifugally Cast White Iron/Gray Iron Dual Metal Abrasion- Resistant Roll Shells.
ASTM A942-95(2001) covers double pour, centrifugally cast, abrasion-resistant roll shells for general application. The outer layer is white iron and the inner layer is gray iron. There shall be no gradient of mottled iron between the white iron and the gray iron.
3. Classification
3.1 The white iron portion of the casting shall be classified by type based upon Brinell Hardness.
3.2 The gray iron portion of the casting shall be classified by class based upon tensile strength.