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Inconel 625 （NO6625）
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Inconel 625 Features and Applications Overview:
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The alloy is molybdenum and niobium as the main strengthening element of the solid solution strengthened nickel-based superalloy with excellent corrosion resistance and oxidation performance, from low to 980 ℃ have good tensile properties and fatigue properties, and salt-tolerant Fog corrosion in the atmosphere. Therefore, it can be widely used in the manufacture of aeroengine parts, aerospace structural parts and chemical equipment.
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Inconel 625 Similar brands:
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NS336 GH3625 GH625 (China), NC22DNb (France), W.Nr.2.4856 (Germany)
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Inconel 625 Chemical composition:
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Alloy
Grade
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%
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Ni
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Cr
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Fe
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Mo
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Nb
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Co
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C
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Mn
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Si
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S
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Cu
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Al
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Ti
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Inconel
625
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Min
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Margin
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20.0
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8.0
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3.15
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Max
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23.0
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5.0
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10.0
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4.15
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1.0
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0.10
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0.5
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0.5
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0.015
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0.07
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0.4
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0.4
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Inconel 625 Physical properties:
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Density
g/cm3
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Melting point
℃
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Thermal conductivity
λ/(W/m•℃)
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Specific heat capacity
J/kg•℃
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Elastic Modulus
GPa
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Shear modulus
GPa
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Resistivity
μΩ•m
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Poisson's ratio
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Linear expansion coefficient
a/10-6℃-1
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8.44
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1290
1350
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12.1(100℃)
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430
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205
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79
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1.28
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0.308
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12.3(20~100℃)
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Inconel 625 Mechanical properties: (at 20 ℃ to detect the minimum mechanical properties)
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Heat treatment methods
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tensile strengthσb/MPa
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Yield Strengthσp0.2/MPa
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Elongationσ5/%
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Brinell hardness HBS
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Solution treatment
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830
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410
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30
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290
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Inconel 625 生产执行标准：
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Standard
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Bar
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Forgings
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Plate (with) material
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Wire
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Pipe
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American Society for Testing and Materials
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ASTM B446
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ASTM B446
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ASTM B443
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ASTM B444
ASTM B704
ASTM B705
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American Aerospace Materials Technical Specification
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AMS 5666
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AMS 5666
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AMS 5599
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AMS 5837
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AMS 5581
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American Society of Mechanical Engineers
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ASME SB446
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ASME SB446
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ASTM SB443
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ASME SB444
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Inconel 625 metallographic structure：
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The microstructure of the alloy is austenite matrix and a small amount of TiN, NbC, and M6C phases in the solution state. The precipitated phases are γ ', δ, M23C6 and M6C after aging at 650-900 ℃ for a long time.
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Inconel 625 process performance and requirements:
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1, the alloy has good cold and hot forming properties, ingot forging heating temperature 1120 ℃.
2, the average grain size of the alloy and forging deformation degree, the final forging temperature is closely related.
3, the alloy welding performance is good, can be protected under the atmosphere with tungsten or the alloy as a material for argon arc welding, but also can be used for brazing and resistance seam welding.
4, the surface treatment process: remove the oxide surface when the first alkaline base wash, then acid sales, hydrofluoric acid - water pickling.
5, when the alloy cold working when the processing capacity is greater than 15%, after annealing to be annealed.
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