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  Austenitic SS 321

  

  
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  Austenitic SS 347

  Stainless Steels Are Iron Based Alloys Containing At Least 10.5% Chromium. They Achieve Their Stainless Characteristics Through The Formation Of An Invisible And Adherent Chromium Rich Oxide Film. Alloy 347 Is A General Purpose Austenitic Stainless Steel With A Face Centered Cubic Structure. It Is Essentially Non-magnetic In The Annealed Condition And Can Only Be Hardened By Cold Working. Niobium Has Been Added To Suppress Grain Boundary Chromium Carbide Precipitation.

  

  
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  Austenitic SS 317 317L

  Stainless steel AISI 317L has as its main characteristic the great addition of molybdenum to its chemical composition, which guarantees an increased resistance to chemical attack when compared with chromium-nicke-molybdenuml austenitic steels of the type AISI 316L. This grade has approximately 1% more chromium, nickel and molybdenum when compared with austenitic steel AISI 316L. Grade AISI 317L offers even better creep deformation characteristics and mechanical resistance to high temperatures when compared with conventional stainless steels. The American denomination “low carbon”, or simply “L”, of grade AISI 317L ensures resistance to sensitization during welding or when thermal processes are applied due to the low carbon in its chemical composition. The combination of molybdenum and nitrogen in the chemical composition of this grade is particularly effective in incresing the resistance to pitting corrosion and crevice, especialy in acid medium with chlorides and sulfur compounds at high temperatures. In addition, nitrogen also contributes to increasing the mechanical strength of the alloy. The main applications of AISI 317L are dedicated to the chemical industry, petroleum and petrochemical industries, industries producing paper and pulp, and as condenseres in power stations using fossile and nuclear fuels. It is intended where it is required to have corrosion resistance to strong organic acids, such as the naphthenic acids found in the petroleum refining.

  

  
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  Austenitic SS 660

  AISI No. 660 is a heat-resistant iron-chromium-nickel alloy recommended for applications requiring high strength and good resistance to corrosion at temperatures up to 1300 F and for lower stresses at higher temperatures. This age-hardenable stainless steel has high resistance to oxidation in continuous service to 1500 F and in intermittent service to 1800 F. Its many high-temperature applications include jet-engine turbine wheels and blades, bolting and afterburner parts. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep and fatigue. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-382. Producer or source: Stainless steel mills.