Chemical Composition Base Element Fe (Iron) B (Boron) 0.0005 to 0.003 % C (Carbon) 0.17 to 0.24 % Fe (Iron) 98.1 to 99 % (estimate) Mn (Manganese) 0.7 to 1.2 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.05 % (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 Carbon Steel Alloy Group Low-carbon steel and HSLA steel Alloy Sub-Group Boron steel Country USA Standards Body SAE (USA) Description Bar, rod, wire Designation 15B21H Specification Type Standard Specification SAE J776 Specification Status Obsolete Specification Status Notes withdrawn Source Worldwide Guide to Equivalent Irons and Steels, 5th ed.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 SAE, International (SAE) (SAE J)
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Chemical Composition