Chemical Composition Base Element Fe (Iron) C (Carbon) 0.2 % (maximum) Cr (Chromium) 0.3 % (maximum) Cu (Copper) 0.4 % (maximum) Fe (Iron) 93.9 to 96.8 % (estimate) Mn (Manganese) 0.9 % (maximum) Mo (Molybdenum) 0.12 % (maximum) Nb (Niobium) 0.02 % (maximum) Ni (Nickel) 3.2 to 3.7 % P (Phosphorus) 0.025 % (maximum) S (Sulfur) 0.025 % (maximum) Si (Silicon) 0.35 % (maximum) V (Vanadium) 0.05 % (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 42.1 to 52.2 ksi Ultimate Tensile Strength 60.2 to 66 ksi Elongation 22 % strain (minimum) Brinell Hardness 149 to 217 Other Information Material Class Ferrous Alloy Alloy Family High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels) Alloy Group Miscellaneous or unclassified Alloy Sub-Group Miscellaneous high-alloy steel Country USA Standards Body ASTM (USA) Description Forged carbon and alloy steel flanges for petroleum and gas pipelines for low ambient temps; mech props vary with Class 1 and 2 Designation L7 Specification Type Standard Specification ASTM A707/A707M Specification Year 2002 Specification Status Active Specification Status Notes active 2002 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)
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Chemical Composition

Base Element

Fe (Iron)