Chemical Composition Base Element Fe (Iron) Al (Aluminum) 0.05 % (maximum) C (Carbon) 0.2 % (maximum) Cr (Chromium) 0.2 % (maximum) Cu (Copper) 0.35 % (maximum) Fe (Iron) 94 to 96.5 % (estimate) Mn (Manganese) 0.9 % (maximum) Mo (Molybdenum) 0.06 % (maximum) Ni (Nickel) 3.3 to 3.8 % P (Phosphorus) 0.02 % (maximum) S (Sulfur) 0.02 % (maximum) Si (Silicon) 0.15 to 0.35 % V (Vanadium) 0.05 % (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 Yield Strength 260 MPa (minimum) Ultimate Tensile Strength 485 to 655 MPa Elongation 22 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels) Alloy Group Miscellaneous or unclassified Alloy Sub-Group Miscellaneous high-alloy steel Country USA Standards Body ASTM (USA) Description Heat-treated forged alloy steel with mandatory toughness requirements for pressure vessels, feedwater heaters, etc. Designation Grade III Specification Type Standard Specification ASTM A765/A765M Specification Year 2004 Specification Status Active Specification Status Notes active 2004 Source Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006 Available forms Wrought Similar Alloys Click here to find similar alloys Links Organizations American Society for Testing and Materials (ASTM)
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Chemical Composition

Base Element

Fe (Iron)