Chemical Composition Base Element Fe (Iron) C (Carbon) 0.05 to 0.15 % Cr (Chromium) 2.7 to 3.3 % Fe (Iron) 94.3 to 96.2 % (estimate) Mn (Manganese) 0.3 to 0.6 % Mo (Molybdenum) 0.8 to 1.06 % P (Phosphorus) 0.025 % (maximum) S (Sulfur) 0.025 % (maximum) Si (Silicon) 0.5 % (maximum) 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 310 MPa (minimum) Ultimate Tensile Strength 515 to 690 MPa Elongation 19 % strain (minimum) Other Information Material Class Ferrous Alloy Alloy Family Alloy Steel Alloy Group Chromium molybdenum steel Alloy Sub-Group Miscellaneous chromium molybdenum steel Country USA Standards Body ASTM (USA) Description Ferritic steel forgings for boilers, pressure vessels, high-temp parts and associated equipment. Alternate Name formerly Class F21 Designation Grade F21, Class 3 Specification Type Standard Specification ASTM A336/A336M Specification Year 2003 Specification Status Active Specification Status Notes active 2003 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)
No warranty is given for the accuracy of these data Copyright © 2024 ASM International®

Chemical Composition