Material: BS 301 S 21 Description: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate,Sheet and Strip for Pressure Vessels and for General Applications Group Name: Ferrous Stainless Steel Alloys Sub Group: BS 301 S 21Chromium and Chromium-Nickel Stainless Steel for Pressure Vessels and for General Applications Application: Intended for Valve, Pump, General Engineering, Automotive and Other Industries Standard: BS-BRITISH STANDARD