Chemical Composition Base Element Co (Cobalt) C (Carbon) 1.1 to 1.7 % Co (Cobalt) 45.7 to 65.5 % Cr (Chromium) 26 to 33 % Fe (Iron) 3 % (maximum) Mn (Manganese) 1 % (maximum) Mo (Molybdenum) 1 % (maximum) Ni (Nickel) 3 % (maximum) P (Phosphorus) 0.03 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.4 to 2 % W (Tungsten) 7 to 9.5 % Composition Note Co 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. 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 High-carbon high-alloy steel Country USA Standards Body SAE (USA) Description Engine poppet valve, facing alloy. Alternate Name formerly VF 7, commercially Stellite 12 Designation R30012 Specification Type Standard Specification SAE J775 Specification Year 1993 Specification Status Active Specification Status Notes active 1993 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 SAE, International (SAE) (SAE J)
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Chemical Composition