Material: ASTM A297 Grade HI Description: Standard Specification for Steel Castings, Iron‐Chromium and Iron‐Chromium‐Nickel, Heat Resistant for General Application Group Name: Ferrous Stainless Steel Alloys Sub Group: ASTM A297/ A297M Steel Castings, Iron‐Chromium and Iron‐Chromium‐Nickel, Heat Resistant for General Application Application: Intended for Valve, Pump, General Engineering, Automotive and Other Industries Grade Standard: AS-AUSTRALIA