Chemical Composition Base Element Fe (Iron) C (Carbon) 0.18 to 0.23 % Cr (Chromium) 0.4 to 0.6 % Cu (Copper) 0.35 % (maximum) Fe (Iron) 97.1 to 98.5 % (estimate) Mn (Manganese) 0.7 to 0.9 % Mo (Molybdenum) 0.08 to 0.15 % Ni (Nickel) 0.25 % (maximum) P (Phosphorus) 0.035 % (maximum) S (Sulfur) 0.04 % (maximum) Si (Silicon) 0.15 to 0.35 % 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 Alloy Steel Alloy Group Chromium molybdenum steel Alloy Sub-Group 4118/ 4120/ 4121 Country USA Standards Body ASTM (USA) Description HW alloy steels with restricted hardenability; composition open-hearth process. Designation 4118RH Specification Type Standard Specification ASTM A914/A914M-92 Specification Year 1999 Specification Status Active Specification Status Notes active 1999 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 American Society for Testing and Materials (ASTM)
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Chemical Composition