Range attributes C (Carbon) 0.37 to 0.43 % Cr (Chromium) 0.65 to 0.95 % Fe (Iron) 95 to 96.5 % (estimate) Mn (Manganese) 0.55 to 0.85 % Mo (Molybdenum) 0.15 to 0.3 % Ni (Nickel) 1.6 to 2 % P (Phosphorus) 0.035 % S (Sulfur) 0.035 % Si (Silicon) 0.15 to 0.4 % 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 Spain Material Class Ferrous Alloy Source Worldwide Guide to Equivalent Irons and Steels, 5th ed. ASM International 2006 Specification Status Obsolete Specification Type Standard Standards Body AENOR (Spain) 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* Spain Description_old Quenched and tempered Designation 40NiCrMo7 Specification UNE 36012 Specification Status Notes cancelled 1991 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 1975 Further Information Organizations Asociacion Espanola de Normalizacion y Certificacion (AENOR) (Spanish Association for Standardization and Certification) (UNE)
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Range attributes

C (Carbon)

0.37 to 0.43