Alloy 825 (N08825) is a titanium-stabilised nickel-chromium-iron-molybdenum-copper alloy designed for use in extremely corrosive environments. It has a very high resistance to oxidation and outstanding resistance to stress corrosion cracking in chloride conditions. It achieves good mechanical properties from cryogenic to medium-high temperatures (540oC) and can be significantly strengthened through cold working.
Alloy 825 (N08825) is resistant to pitting corrosion in sulphuric and phosphoric acids and resists attack in strongly oxidising media such as nitrates, nitric acid and oxidising salts. It also resists most organic acids and alkali solutions. The alloy is reasonably ductile and can be worked in a similar way to austenitic stainless steels.
Related Specifications of Alloy 825
- WFe32C20DU (FR)
- NiCr21Mo (DE)
Nominal Composition of Alloy 825
Ni 42.0%, Fe 30.0%, Cr 21.5%, Mo 3.0%, Cu 2.2%
Mechanical Properties of Alloy 825
|Ultimate Tensile Strength (N/mm²)||Proof Stress (N/mm²)||Elongation (%)||Hardness (HB)|
Key Features of Alloy 825
- Excellent corrosion resistance
- High resistance to oxidation
- Good ductility and workability
Applications of Alloy 825
Chemical processing | Phosphoric acid evaporators; pickling-tank heaters, pickling hooks and equipment, and chemical process equipment
Power generation | Components for spent nuclear fuel element recovery
Other | Tank trucks and propeller shafts
Columbia Metals – a leading supplier of Alloy 825
With decades of experience and a huge range of stock, Columbia Metals is an industry leader in the supply of Alloy 825 and other high quality specialist engineering alloys.
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