Inconel 625 Powder Description
Inconel 625 (Alloy 625, UNS N06625) is used for its high strength, good manufacturability (including joining) and resistance to corrosion. Its service temperature range spans from cryogenic levels up to 982°C (1800°F). The alloy exhibits high tensile, creep and fracture strength as well as adequate fatigue and thermal fatigue performance. Its oxidation resistance and welding and brazing capabilities render it applicable in aerospace. It is employed in aircraft duct systems, engine exhaust assemblies, thrust reverser systems, resistance‐welded honeycomb structures for engine control compartments, fuel and hydraulic piping, spray bars, bellows, turbine shrouds and heat exchanger tubes for environmental control systems. It is also suitable for transitional linings in combustion systems, turbine seals, compressor blades and nozzle guide tubes for rockets.
Stanford Advanced Materials (SAM) is a global supplier of Inconel 625 (Alloy 625, UNS N06625) powder with over two decades of experience in the production and sale of Inconel 625 (Alloy 625, UNS N06625) powder.
Inconel 625 Powder Specifications
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Product Name
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Inconel 625 Powder
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Alloy
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Inconel 625
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Related Grades
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Nickel Alloy IN625
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Compositions
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Ni at least 58%
Cr 20–23%
Fe max. 5%
Mo 8–10%
Nb 3.15–4.15%
Co max. 1%
Si max. 0.50%
P and S max. 0.15%
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Size Classes
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–105 +45 micrometres
–53 +15 micrometres
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ASTM
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446 Gr, 1443 Gr
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AMS Specification
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5599, 5666
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Applications for Inconel 625 Powder
The reliable corrosion resistance of Inconel 625 over a broad temperature and pressure range constitutes a primary reason for its use in chemical processing. Its ease of fabrication permits the production of various components for process equipment. Its high strength allows the use of thinner-walled vessels or piping compared with other materials, thereby enhancing heat transfer and reducing weight. Applications that require the combination of strength and corrosion resistance include bubble caps, pipes, reactors, distillation columns, heat exchangers, transfer lines and valves.
In the nuclear sector, Inconel 625 is used for reactor core and control rod components in pressurised water reactors. The material is selected for its high strength, consistent corrosion resistance, resistance to stress corrosion cracking and pitting resistance in water at temperatures between 260 and 316°C (500 and 600°F).
The alloy is also considered for advanced reactor concepts given that it exhibits a high allowable strength at elevated temperatures, particularly between 649 and 760°C (1200 and 1400°F).
The influence of processing parameters in the LRM of Inconel 625 (Alloy 625, UNS N06625) powder was investigated. The optimal parameter set for maximum deposition rate was determined using an orthogonal L9 array and the Taguchi method. Results indicated that powder feed rate and scan speed contributed approximately 56% and 26% respectively to the deposition rate, while laser power contributed 10%.
The fabricated components underwent non-destructive testing (for example, ultrasonic testing and dye penetrant inspection), tensile testing, impact testing, metallographic evaluations and microhardness measurements. Test results confirmed defect-free material deposition with increased mechanical strength without any loss in ductility.
Reference
C.P.Paul, P.Ganesh, S.K.Mishra, P.Bhargava, J.Negi, A.K.Nath: Investigation of Laser Rapid Manufacturing for Inconel-625 components. Optics & Lasertechnik, volume 39, issue 4, June 2007, pages 800–805
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