UNS: N06625 | W. Nr: 2.4856 | EN: NiCr22Mo9Nb
Alloy 625
Alloy 625 is a nickel-chromium-molybdenum alloy known for its exceptional resistance to oxidation and corrosion in a wide range of severe environments. It offers outstanding strength and toughness from cryogenic temperatures up to 2000°F (1093°C), making it ideal for aerospace, chemical processing, and marine applications.
Key Features
- High-Temperature Strength: Maintains excellent performance up to 980°C (1800°F).
- Corrosion Resistance: Exceptional resistance to oxidizing and reducing environments.
- Stress-Corrosion Cracking: Outstanding resistance in chloride-containing solutions.
- Versatility: High strength and toughness from cryogenic to elevated temperatures.
- Chemical Resistance: Superior performance in acids, alkalis, and seawater.
Industries and Applications
- Marine & Offshore: Ideal for seawater and harsh marine environments
- Aerospace: Used in jet engine exhaust systems and turbine components
- Chemical Processing: Perfect for handling acids and corrosive chemicals
- Power Generation: Components exposed to extreme heat and pressure
- Oil & Gas: Excellent for downhole and subsea equipment
Heat Treatment Capabilities
- Cannot be hardened by heat treatment – Alloy 625 gains strength through solid solution strengthening, not precipitation hardening.
- Annealing at 1,600–1,800°F (870–980°C) restores ductility and relieves stress after cold work.
- Excellent weldability – No post-weld heat treatment required for most applications.
- Maintains toughness and corrosion resistance across a wide temperature range, from cryogenic to 980°C (1,800°F).
Available Forms
