Chemical Composition Base Element Fe (Iron) Al (Aluminum) 0.85 to 1.2 % C (Carbon) 0.3 to 0.4 % Cr (Chromium) 1 to 1.5 % Fe (Iron) 94.8 to 96.8 % (estimate) Mn (Manganese) 0.5 to 1.1 % Mo (Molybdenum) 0.15 to 0.25 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.06 % (maximum) Se (Selenium) 0.15 to 0.25 % Si (Silicon) 0.2 to 0.4 % 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. Mechanical Properties Yield Strength 1.1e7 lbf/ft^2 Ultimate Tensile Strength 1.52e7 lbf/ft^2 Elongation 20 % strain Brinell Hardness 217 to 262 Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium molybdenum steel Alloy Sub-Group 4130/ 4135/ 4137 Country USA Standards Body DoD (USA) Description Forging, bar, billet for nitriding; supersedes MIL-S-869C(58) Designation Class B Specification Type Standard Specification DoD-F-24669/3 Specification Year 1986 Specification Status Active Specification Status Notes Active 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)
No warranty is given for the accuracy of these data Copyright © 2024 ASM International®

Chemical Composition