Material: ASTM A541 Grade 11 Class 4 Description: Standard Specification for Quenched and Tempered Carbon and Alloy Steel Forgings for Pressure Vessel Components Group Name: Ferrous Mild Steel Alloys Sub Group: ASTM A541 Grade 11 Class 4 Quenched and Tempered Carbon and Alloy Steel Forgings for Pressure Vessel Components Application: Intended for Valve, Pump, General Engineering, Automotive and Other Industries Standard: AS-AUSTRALIA