Nickel 625 a Superalloy for Extreme Environments
Nickel 625, commonly referred to as Inconel 625, is a superalloy that can be used in extreme applications and environments like those in the aerospace and marine industries.
This austenitic alloy has exceptional resistance to oxidation, corrosion, and fatigue, and it has excellent toughness and strength at extreme temperatures. Nickel 625 derives its strength and corrosion resistance from its molybdenum and columbium content, making it suitable for a variety of oxidizing and non-oxidizing environments.
Features of Nickel Alloy 625
Nickel 625 possesses a unique combination of features that makes it ideal for extreme environments. These features include:
Resistance to Chloride Pitting
Chloride pitting is a type of pitting corrosion that can degrade metals through small weak points. If the external surface layer of an oxidized or treated material is scratched or the underlying material is otherwise exposed, pitting can occur. Nickel 625 is resistant to this form of corrosion.
Resistance to Crevice Corrosion Cracking
Components constructed from nickel 625 are resistant to crevice corrosion. This type of corrosion is caused in stagnant fluids like seawater, which can penetrate small cracks and pits to create a high-pH environment that degrades the metal.
Immunity to Chloride Ion Stress Corrosion Cracking
When tensile stress and corrosive chloride ions combine, they can cause cracks to appear in impacted metal surfaces. Nickel 625 contains enough nickel to resist this form of corrosion, making it a superior choice to stainless steel.
Resistance to Caustic Materials
Nickel 625’s high nickel content protects it from damage in alkaline solutions and exposure to hydrogen ions.
Resistance to Flowing and Stagnant Seawater Damage
Because of its unique resistance to pitting and other forms of corrosion, nickel 625 can withstand seawater moving at different speeds without the risk of wearing away or degrading the surface of the metal.
Using Nickel 625 in the Aerospace Industry
Due to its strength and resistance to damage in extreme environments, Inconel 625 is an excellent material for fabricating aerospace parts, equipment, and hardware. Applications include:
● Aerospace Turbines. Nickel 625 has superior strength and creep resistance. This protects turbines from deformations caused by the high temperatures generated during turbine operation.
● Turbine Shroud Rings. Turbine inlet nozzles are set in inner and outer shrouds. Inconel 625 shroud rings provide protection from thermal stress, add strength to support the shrouds and vanes, and accommodate movement from thermal expansion.
● Engine Thrust-Reverser Systems. These safety systems assist jets in slowing down after touchdown to protect the brakes and give jets more flexible landing distances. Inconel 625 components can withstand the stress and forces of this operation.
● Jet Engine Exhaust Systems. Exhaust systems manage the flow of hot exhaust gases so they don’t interfere with the jet’s performance. Components made from nickel 625 ensure that the systems can withstand extreme temperatures from gases and heat radiation.
● Aircraft Ducting Systems. Aircraft ducting systems are high-pressure systems that include functionalities like anti-icing, engine bleed air, and more. Inconel parts can resist damage from both extreme heat and extreme cold for reliable performance.
Contact Continental Steel & Tube Today for Nickel 625
At Continental Steel & Tube, we specialize in supplying high-quality nickels, steels, and other metals. As a proud supplier to some of the biggest names in the aerospace and military industries, we ensure that our partners have the necessary metals and alloys to meet strict project specifications and requirements.
We have different forms of options:
- Sheet (ASTM B443 ASME SB443 AMS 5599)
- Plate (ASTM B443 ASME SB443 AMS 5599)
- Bar (ASTM B446 ASME SB446 AMS 5666) / (AMS 5666, ASTM-B-446, ASME-SB-446)
- Pipe & Tube (welded & seamless) (ASTM B444 / ASTM B704 AMS 5581 )
- Wire (AMS 5837)
- Fittings & Flanges (ASTM B366 )