Incoloy 825 is a nickel / iron / chromium alloy engineered with added titanium, copper and molybdenum for superior corrosion resistance in demanding engineering environments. The Incoloy name is a trademark registered by the Special Metals Corporation in the USA.
Composition
The main constituents of Incoloy 825 are as follows, given as percentages:
- Nickel: 42%
- Iron: 28.5%
- Chromium: 21.5%
- Molybdenum: 3%
- Copper: 2.25%
- Plus trace quantities of manganese, titanium, silicon, aluminium, sulphur and carbon
Common Industry Applications
Incoloy 825 has an impressive range of acid resistances. It also has a great temperature range, maintaining strength at extremely low temperatures, to heats as high as 400°C. It is therefore used in a range of extreme environments, including nuclear reactors and acid processing plants.
- Nuclear industry
- Oil and gas – especially high pressure applications
- Acid manufacturing and processing
Advantages
- Excellent resistance to seawater
- Excellent resistance to organic acids, sulfuric acid and nitric acid
- Good resistance to alkalines, salts, hydrochloric acid, hydrofluoric acid and phosphoric acid
- Reasonable resistance to aqueous chlorine
- Extremely versatile thermal range with no loss of performance
- Good crevice corrosion and pitting resistance
Disadvantages
- Cost: Incoloy 825 is more expensive than some other nickel alloys
Components
At Hydraulics & Gas, we are happy to supply tube fittings and tubing made from high-quality Incoloy 825. Tubing is available in standard sizes of up to 25mm, with bespoke components available on request. We can supply a full range of fittings, including bulkhead couplings, adapters and compression fittings – in single and double ferrule. Get in touch for further details.
Alternative Trade Names: Alloy 825, UNS N08825