Chemical Composition Base Element Fe (Iron) C (Carbon) 0.73 to 0.83 % Co (Cobalt) 0.5 % (maximum) Cr (Chromium) 3.8 to 4.5 % Fe (Iron) 72.9 to 77.6 % (estimate) Mn (Manganese) 0.4 % (maximum) Mo (Molybdenum) 0.7 % (maximum) P (Phosphorus) 0.03 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.4 % (maximum) V (Vanadium) 0.9 to 1.2 % W (Tungsten) 17 to 18.5 % 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 Rockwell Hardness C scale 63 Other Information Material Class Ferrous Alloy Alloy Family Tool Steel Alloy Group High-speed tool steel Alloy Sub-Group Tungsten high-speed steel Country Hungary Standards Body MSZ (Hungary) Description Quenched and tempered Designation R3 Specification Type Standard Specification MSZ 4351 Specification Year 1984 Specification Status Active 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 Magyar Szabvanyugyi Testulet (MSZT) (Hungarian Standards Institution)
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Chemical Composition