Chemical Composition Base Element Fe (Iron) C (Carbon) 2 to 2.85 % Cr (Chromium) 5 to 5.75 % Fe (Iron) 81.8 to 86.1 % (estimate) Mn (Manganese) 0.8 % Mo (Molybdenum) 0.9 to 1.4 % Ni (Nickel) 0.3 % Si (Silicon) 0.5 % V (Vanadium) 3.9 to 5.15 % W (Tungsten) 0.5 to 1.5 % 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. Other Information Material Class Ferrous Alloy Alloy Family Tool Steel Alloy Group Cold-work tool steel Alloy Sub-Group Air-hardening medium-alloy cold-work steel Country USA Standards Body FED (USA) Designation A7 Specification Type Standard Specification FED QQ-T-570 Specification Year 1987 Specification Status Obsolete Specification Status Notes Cancelled (S/S By ASTM A681) 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 Department of Defense (MIL/DoD-F/FED QQ)
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Chemical Composition