Inconel 625

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