Inconel 625
Inconel 625 – Solid-Solution Nickel Superalloy with Outstanding Corrosion Resistance and Weldability
Inconel 625 is a solid-solution strengthened Ni-Cr-Mo superalloy offering outstanding resistance to oxidation and corrosion across a wide temperature range, combined with excellent weldability. Unlike precipitation-hardened superalloys, it requires no post-weld heat treatment (PWHT), making it ideal for fabricated structures in the harshest chemical, marine, and offshore environments.
Key Properties
- Tensile Strength: 930 MPa
- Yield Strength: 517 MPa
- Weldability: Excellent — no PWHT required
- Density: 8.44 g/cm³
- Corrosion Resistance: Excellent in a wide range of environments
- Standards: AMS 5666 / ASTM B443
Common Applications
Offshore oil and gas risers and flowlines, subsea umbilicals, chemical processing heat exchangers, flue gas scrubbers, aircraft engine exhaust systems, and marine propulsion components.
Material properties
| Material name | Inconel 625 |
|---|---|
| Type | Nickel Alloys |
| Standard code | AMS 5666 / ASTM B443 |
| Tensile strength (MPa) | 930 |
| Yield strength (MPa) | 517 |
| Fatigue strength (MPa) | 345 |
| Elongation (%) | 30 |
| Hardness (Brinell) | 200 |
| Density (g/cm³) | 8.44 |
| Electrical resistivity (µΩ·in) | 129 |
| Thermal conductivity (W/m·K) | 9.8 |
| Melting range (°C) | 1290–1350 |
| Weldability | Excellent |
| Formability | Good |
| Shear modulus | 79 |
| Industry code | inconel_625 |