Chemical Composition Base Element Fe (Iron) C (Carbon) 0.04 to 1.1 % Cr (Chromium) 18 to 20 % Fe (Iron) 65.1 to 74 % (estimate) Mn (Manganese) 2 % (maximum) Ni (Nickel) 8 to 11 % P (Phosphorus) 0.04 % (maximum) S (Sulfur) 0.03 % (maximum) Si (Silicon) 0.75 % (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 207 MPa Ultimate Tensile Strength 517 MPa Other Information Material Class Ferrous Alloy Alloy Family High-Alloy Steel (Corrosion and Heat Resistant, Stainless, and Nickel Steels) Alloy Group Austenitic stainless steel Alloy Sub-Group 304H Country Mexico Standards Body NMX (Mexico) Description Seamless pipe for high-temp central station service Designation TP304H Specification Type Standard Specification NMX-B-186-SCFI Specification Year 1994 Specification Status Active Specification Status Notes 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 Direccion General de Normas (DGN) (General Directorate of Standards) (NMX/NOM/DGN)
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Chemical Composition