Range attributes C (Carbon) 1.05 to 1.15 % Co (Cobalt) 4.7 to 5.2 % Cr (Chromium) 3.8 to 4.5 % Fe (Iron) 73.3 to 77.5 % (estimate) Mn (Manganese) 0.4 % (maximum) Mo (Molybdenum) 3.8 to 4.3 % P (Phosphorus) 0.03 % (maximum) Rockwell Hardness C scale 66 S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.4 % (maximum) V (Vanadium) 2.7 to 3.2 % W (Tungsten) 6.5 to 7.5 % Discrete attributes ~Checking Status Not verified - Original build Date Last Checked Thursday, October 17, 2013 Alloy Family Tool Steel Alloy Group High-speed tool steel Alloy Sub-Group Molybdenum high-speed steel Available forms Wrought Base Element Fe (Iron) Country Hungary Material Class Ferrous Alloy Source Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006 Specification Status Active Specification Type Standard Standards Body MSZ (Hungary) Short text attributes Composition Note_old 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. Country* Hungary Description_old Quenched and tempered Designation R9 Specification MSZ 4351 Long text attributes 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. Description Quenched and tempered Hyperlink attributes Similar Alloys Click here to find similar alloys Integer attributes Specification Year 1984 Further Information Organizations Magyar Szabvanyugyi Testulet (MSZT) (Hungarian Standards Institution)
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Range attributes

C (Carbon)

1.05 to 1.15