EDELSTAHL SCHNEIDTECHNIK RHEIN-RUHR

Alloy 625

High-alloy Nickel-Chromium-Molybdenum alloy with excellent corrosion resistance, strength, and weldability at extreme temperatures and in aggressive chemical environments

Alloy 625 (also known as Inconel 625) is a high-alloy nickel-chromium-molybdenum alloy, widely used for its excellent corrosion resistance, strength, and weldability under extreme temperatures and in aggressive chemical environments. This material is commonly applied in aerospace, chemical industry, marine applications, and power generation.

Chemical Composition (in %):

Element

Content

Nickel (Ni)

58–72 %

Chromium (Cr)

20–23 %

Molybdenum (Mo)

8–10 %

Iron (Fe)

up to 5 %

Niobium (Nb)

3,15–4,15 %

Manganese (Mn)

up to 1 %

Carbon (C)

up to 0.1 %

Silicon (Si)

up to 1 %

Sulfur (S)

up to 0.015 %

Titanium (Ti)

0,4–1,15 %

Properties:

Corrosion resistance:

  • Outstanding resistance against acids, seawater, chlorides, and other aggressive chemical environments
  • Ideal for offshore and chemical processing applications with high corrosion loads

Heat resistance:

  • Excellent thermal stability, usable up to 980 °C (1800 °F), maintaining mechanical properties in hot gas environments

Strength and toughness:

  • High strength and toughness at both low and high temperatures. Retains stability under extreme loads with good fatigue and crack resistance.

Weldability:

  • Excellent weldability with low sensitivity to porosity and cracking during welding

Niobium and Molybdenum effects:

  • Enhance corrosion resistance, strength, and resistance to stress corrosion cracking

Thermal expansion:

  • Low thermal expansion makes it advantageous for applications requiring dimensional stability under temperature fluctuations

Applications:

  • Aerospace: Used in engine components such as turbine blades, jet engines, and exhaust systems due to high-temperature and load resistance.
  • Chemical industry: Applied in equipment exposed to corrosive media such as pipes, reactors, and tanks in petrochemical processes.
  • Offshore and subsea applications: Highly resistant to seawater corrosion and stress corrosion, ideal for offshore installations.
  • Power plants and energy generation: Used in steam turbines, combustion chambers, and other high-temperature systems.
  • Nuclear industry: Applied in fuel elements and reactor components requiring high resistance and stability.

Conclusion:

Alloy 625 (Inconel 625) is an extremely resilient material, offering both high strength and excellent corrosion resistance. Its versatility and superior performance at high temperatures and in extreme chemical environments make it a preferred choice for demanding applications in aerospace, chemical industry, power generation, and marine sectors.

Note: The information in this datasheet is provided for description purposes only; no liability is assumed!