Overview
Incoloy 825 (Nickel Alloy 825 or UNS N08825) is a nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It is high Nickel content material with minimum Ni 38% to 46%, combined with small value of Mo, Cu and Ti gives Incoly 825 enhanced corrosion resistance to many corrosive environments. It can provide high levels of corrosion resistance to both moderately oxidizing and moderately reducing environments. This balance of alloying elements grants this alloy exceptional resistance to both chloride stress corrosion cracking, as well as crevice corrosion and general corrosion. Chloride stress corrosion cracking is a type of localised intergranular corrosion on materials that are put under tensile strength, in high temperatures and in an environment that includes oxygen and chloride ions such as seawater. The addition of titanium in this alloy also helps to stabilize the alloy against intergranular corrosion. Like other austenitic, nickel alloy, Alloy 825 is ductile over a wide range of temperatures from cryogenic to well in excess of 1000 °F (538 °C).
Chemical composition
| Nickel | Chromium | Iron | Manganese | Carbon | Copper | Silicon | Sulfur | Aluminum | Titanium | Molybdemum |
| 38.0-46.0 | 19.5*23.5 | 22.0min | 1.0max | 0.05max | 1.5-3.0 | 0.5max | 0.03max | 0.2max | 0.6-1.2 | 2.5-3.5 |
Mechanical Properties
| Alloy | Condition and size | Tensile Strength min,ksi(Mpa) | Yield Strength 0.2% offset,min,ksi(Mpa) | Elongation in 2 in or 50 mm(4D),min |
| UNS N08825 | hot-finished annealed | 75(517) | 25(172) | 30 |
| UNS N08825 | cold-worked annealed | 85(586) | 35(241) | 30 |
Application
Chemical processing components
Oil and gas piping, recovery
Acid production
Pickling tank heaters, tanks, and equipment
Pollution control equipment
Hot vessels for food, water, and seawater
Nuclear fuel reprocessing
Radioactive waste handling
Advantage
Excellent resistance to both reducing and oxidizing acids like sulfuric and phosphoric Helps avoid stress-corrosion cracking
Stops localized attacks such as pitting and crevice corrosion
High level of resistance to variety of oxidizing substances such as nitric acid, nitrates, and oxidizing salt
Chromium content confers resistance to a variety of oxidizing substances such as nitric acid, nitrates and oxidizing salt.
Molybdenum offers aids resistance to pitting and crevice corrosion.
Titanium addition with an appropriate heat treatment, to stabilize the alloy against sensitization to intergranular corrosion.
Why choose us
1.Size control
2.Chemical composition control
4.ultrasonic testing of steel tube
3.hydraulic testing machine
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