Drawing No. EH–MT–016 // Engineering Materials
INCONEL 625 Properties
Reviewed August 2026
INCONEL 625 is a solid-solution-strengthened nickel alloy combining corrosion resistance, weldability and useful strength from cryogenic to elevated temperatures.
Representative properties
The stated basis, temperature and direction are part of the value. Switch units without changing the physical reference.
What changes these properties?
Engineering variability
- Strength changes with cold work and product form; 625 is not primarily precipitation hardened like 718.
- Thermal conductivity is much lower than carbon steel or copper.
- The approximate Poisson ratio is a typical engineering reference rather than a guaranteed product property.
- Corrosion performance depends strongly on environment, weld condition and surface state.
Selection note
Used in chemical processing, seawater, pollution-control equipment, aerospace ducting, bellows and high-corrosion piping or components.
Where a property is shown as qualitative rather than numeric, that is intentional: the selected source or the material physics does not justify a single comparable scalar.
How to interpret this material
Stiffness
Young’s modulus describes elastic stiffness. For crystals and composites, orientation can make one scalar modulus only a directional reference.
Strength / failure
Ductile metals can use yield and tensile strength. Brittle ceramics/semiconductors and anisotropic composites require fracture, flexural or directional strength descriptions instead.
Thermal response
Conductivity, heat capacity and expansion are temperature dependent. The last column is a melting or transition descriptor only where that physical concept is appropriate.
Technical sources
The database favors manufacturer, industry, government or academic technical references and labels secondary condition-specific datasets when a primary source does not expose a complete property set.