Chemical Composition Base Element Fe (Iron) C (Carbon) 0.25 to 0.34 % Cr (Chromium) 0.8 to 1.2 % Fe (Iron) 97 to 98.2 % (estimate) Mn (Manganese) 0.4 to 0.7 % Mo (Molybdenum) 0.15 to 0.35 % Si (Silicon) 0.15 to 0.4 % Balance Fe (Iron) Composition Note Fe is listed as a Balance element for this material, but its % value is not listed in the specification. The value shown is a calculated one. Mechanical Properties Brinell Hardness 321 Other Information Material Class Ferrous Alloy Country USA Description Quenched and tempered to 321 HB; Abrasion resistant steel plate to 3 in. thick. Designation RQ AR-321 Specification Type Manufacturer's Specification Specification Status Active Source Woldman's Engineering Alloys 9th ed. J. Frick Editor, ASM International 2000 Available forms Plate Similar Alloys Click here to find similar alloys Links Organizations Bethlehem Steel Corp.
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Chemical Composition