Chemical Composition Base Element Fe (Iron) C (Carbon) 0.35 to 0.75 % Cr (Chromium) 17 to 21 % Fe (Iron) 32.2 to 45.6 % (estimate) Mn (Manganese) 2 % (maximum) Mo (Molybdenum) 0.5 % (maximum) Ni (Nickel) 37 to 41 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.04 % (maximum) Si (Silicon) 2.5 % (maximum) Composition Note Fe is listed as a Base element for this material, but its % value is not listed in the specification. The value shown is a calculated one. Mechanical Properties Ultimate Tensile Strength 450 MPa (minimum) Elongation 4 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels) Alloy Group Austenitic stainless steel Alloy Sub-Group HU/ HW/ HX grades Country USA Standards Body ASTM (USA) Description Fe-Cr-Ni alloy castings for heat-resistant service. Alternate Name 19 Chromium, 35 Nickel Designation HU Specification Type Standard Specification ASTM A297/A297M-97 Specification Year 2003 Specification Status Active Specification Status Notes active 2003 Source Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006 Available forms Casting Similar Alloys Click here to find similar alloys Links Organizations American Society for Testing and Materials (ASTM)
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Chemical Composition