Material: ASTM A351 CH20 Description: Standard Specification for Castings, Austenitic, for PressureāContaining Parts Group Name: Ferrous Stainless Steel Alloys Sub Group: ASTM A351 / 351M Castings, Austenitic, for PressureāContaining Parts Application: Intended for Valves, Pumps, General Engineering, Automobile and Other Industries Grade Standard: AS-AUSTRALIA