Range attributes C (Carbon) 0.37 to 0.44 % Cr (Chromium) 0.65 to 0.95 % Cu (Copper) 0.35 % (maximum) Fe (Iron) 94.6 to 96.5 % (estimate) Mn (Manganese) 0.55 to 0.9 % Mo (Molybdenum) 0.2 to 0.3 % Ni (Nickel) 1.55 to 2 % P (Phosphorus) 0.03 % (maximum) S (Sulfur) 0.04 % (maximum) Si (Silicon) 0.15 to 0.35 % Discrete attributes ~Checking Status Not verified - Original build Date Last Checked Thursday, October 17, 2013 Alloy Family Alloy Steel Alloy Group Nickel chromium molybdenum steel Alloy Sub-Group 4340/ E4340 Available forms Wrought Base Element Fe (Iron) Country USA 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 SAE (USA) 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* USA Description_old Alloy H-band steels; for hardenability limits see standard. Designation 4340H Specification SAE J1268 Specification Status Notes active 1995 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 Alloy H-band steels; for hardenability limits see standard. Hyperlink attributes Similar Alloys Click here to find similar alloys Integer attributes Specification Year 1995 Further Information Organizations SAE, International (SAE) (SAE J)
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Range attributes

C (Carbon)

0.37 to 0.44