Inconel 625

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Inconel 625 high temperature alloy Features and applications overview: Inconel 625 is solid solution nickel-based superalloy strengthened by molybdenum and niobium. The alloy has excellent corrosion and oxidation resistance. From low temperature to 950°C, it has good tensile and fatigue properties, and it is resistant to stress corrosion in salt fog atmosphere. Therefore, it can be widely used in the manufacture of aviation engine parts, aerospace structural components and chemical equipment. Inconel 625's similar grades: NS336 GH3625 GH625(China)、 NC22DNb(France)、W.Nr.2.4856(Germany) chemical composition, %: Nickel........................................balance Chromium..................................20.0-23.0 Iron.............................................5.0 max Niobium......................................3.15-4.15 Molybdenum...............................8.0-10.0 Cobalt..........................................1.0 max Carbon.........................................0.1 max Manganese..................................0.5 max Silicon..........................................0.5 max Sulfur...........................................0.015 max Phosphorus...................................0.015 max Copper..........................................0.07 max Aluminium....................................0.4 max Titanium........................................0.4 max physical properties: Density, g/cm3 ......................................................................................8.44 Melting Range, °C................................................................................1290-1350 Thermal conductivity, λ/(W/m•°C), at 100°C .......................................12.1 Specific heat, J/kg•°C............................................................................430 Elastic modulus, GPa.............................................................................205 Shear modulus, GPa................................................................................79 Electrical resistivity, μΩ•m....................................................................1.28 Poisson's ratio.........................................................................................0.308 Coefficient of linear expansion, a/10-6°C-1, at 20-100°C.............12.3 mechanical properties :( the minimum value detected at room temperature) Tensile strength, σb/MPa.....................................830 Yield strength,σp0.2/MPa...............................410 Elongation,σ5 /%...................................................................30 Brinell hardness, HBS.................................................................≤290 The way of heat treatment is solution treatment Available products and specifications: Bar: ASTM B446, AMS 5666, ASME SB446 Forging: ASTM B446, AMS 5666, ASME SB446 Plate/Strip: ASTM B443, AMS 5599, ASME SB443 Wire: AMS 5837 Pipe:ASTM B444, ASTM B704, ASTM B705, AMS 5581, ASME SB444 The metallurgical structure of Inconel625: In the solid solution state, the alloy is austenitic matrix and phase of a amount of TiN, NbC and M6C. After long-term aging of 650-900°C, the phase of precipitation is γ"、δ、M23C6 and M6C. The process performance and requirements of Inconel625: The alloy has good hot and cold formability. The ingot forging heating temperature is 1120°C. The average size of the grain size of the alloy is closely related to the forging deformation degree and the final forging temperature. The alloy has good weldability. The alloy can be argon arc welded using tungsten electrode under protective atmosphere or can be treated as additional material to do argon arc welding. It also can be used in brazing connection and resistance seam welding. Surface treatment process: caustic wash before removing the alloy surface oxide, then pickling in the pin acid, hydrofluoric acid, and aqueous solution. In cold processing when the amount of processing is larger than 15%, annealing shall be carried out after heat processing.

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Shanghai Kangsheng Superalloy Co., Ltd

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