Incoloy® alloy 825

UNS N08825
W.Nr 2.4858

Applications

Applications include chemical processing, pollution control, oil and gas recovery, acid production, pickling operations, nuclear fuel reprocessing and radioactive waste handling.

Description

Incoloy® 825 is a Nickel-Iron-Chrome alloy with excellent resistance to sulfuric and phosphoric acids.  It is also resistant to oxidizing and reducing acids, stress corrosion cracking, pitting and intergranular corrosion.

Industries Supplied

Chemical and Petrochemical, Oil & Gas, Pollution Control and Nuclear

Nominal Composition

C: 0.05 max
Mn: 1.00 max
Si: 0.50 max
S: 0.030 max
Cr: 19.50 - 23.50 
Ni: 38.0 - 46.0 
Mo: 2.50 - 3.50 
Ti: 0.60 - 1.20
Al: 0.20 max
Cu: 1.50 - 3.00 
Fe: Balance

Physical Properties

Density: 0.294 lb/in3, (8.14 g/cm3)

Modulus of Elasticity (E): 
At 70°F (20°C): 28.30 x 103 ksi (196 GPa)

Modulus of Rigidity (G)
At 70°F (20°C):  11 x 103 ksi (76 GPa)

Coefficient of Expansion:
8.8 µin/in.-°F (70°F to 1000°F)
15.8 µm/m-°C (20°C to 538°C) 

Electrical Resistivity: 44.4 µΩ.in, (113 µΩ.cm)

Thermal Conductivity: 76.8 Btu-in/ft2hr-°F, (11.1 W/m-K)

Applicable Specifications

Strip:  ASTM B424, NACE MR0175

Typical Mechanical Properties

  • Annealed
    • Heat Treatment: 1832°F (1000°C)
    • Tensile Strength: 85 ksi (586 MPa) min
    • Suggested Operating Conditions: -300°F to 1600°F (-184°C to 871°C)
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  • INCOLOY® is a registered trademark of the Special Metals Corporation group of companies.

    For further information Contact:

    Email: stripinfo@elgiloy.com
    Phone: 1 888 843 2350 
    Elgiloy Specialty Metals - Strip Products
    1565 Fleetwood Dr.
    Elgin, IL 60123 USA