Chemical Composition Base Element Fe (Iron) C (Carbon) 0.15 % (maximum) Cr (Chromium) 0.7 % (maximum) Fe (Iron) 96.9 to 99.9 % (estimate) Mn (Manganese) 1.75 % (maximum) P (Phosphorus) 0.025 % (maximum) S (Sulfur) 0.035 % (maximum) Si (Silicon) 0.15 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 79.8 ksi Ultimate Tensile Strength 89.9 to 125 ksi Elongation 10 to 13 % strain Other Information Material Class Ferrous Alloy Alloy Family Carbon Steel Alloy Group Low-carbon steel and HSLA steel Alloy Sub-Group 1513 Country Canada Standards Body CSA (Canada) Description t<65 mm, plate, sheet, bar Designation 550AT Specification Type Standard Specification CSA G40.21 Specification Year 1998 Specification Status 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 CSA International (CSA)
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Chemical Composition