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Alloy Portfolio

Nickel 825

Overview

Incoloy 825 is a nickel-iron-chromium alloy with the addition of copper and molybdenum. It falls under the Incoloy family of alloys, known for their excellent corrosion resistance and high-temperature strength. Incoloy 825 is particularly well-suited for applications in aggressive chemical environments, such as those found in the chemical processing, oil and gas, and marine industries.

Key Characteristics of Nickel 825:

  1. Corrosion Resistance: Incoloy 825 offers excellent resistance to a wide range of corrosive environments, including sulfuric acid, phosphoric acid, nitric acid, and chloride-containing environments.
  2. High-Temperature Strength: The alloy maintains its strength and mechanical properties at elevated temperatures, making it suitable for high-temperature applications.
  3. Good Weldability: Incoloy 825 is easily weldable using various welding techniques, allowing for efficient fabrication and repair.
  4. High-Temperature Oxidation Resistance: The alloy exhibits good resistance to oxidation and scaling at elevated temperatures, contributing to its durability in high-temperature environments.
  5. Excellent Formability: Incoloy 825 is easily formed and fabricated through various processes, including cold working and hot working.
  6. Resistant to Stress-Corrosion Cracking: The alloy demonstrates resistance to stress-corrosion cracking in both chloride and sulfide environments.

Applications of Nickel 825:

  1. Chemical Processing: Incoloy 825 is widely used in the chemical processing industry for equipment such as tanks, vessels, heat exchangers, and pipes, where resistance to corrosive chemicals is crucial.
  2. Oil and Gas Industry: The alloy finds applications in the oil and gas sector, including components for downhole tools, wellhead equipment, and pipelines, particularly in environments with corrosive fluids.
  3. Desalination Plants: Incoloy 825 is utilized in desalination plants for its corrosion resistance in seawater environments.
  4. Power Generation: It is used in power generation systems, including components in boilers, heat exchangers, and steam generators.
  5. Aerospace Industry: Certain aerospace applications may use Incoloy 825 due to its high-temperature strength and corrosion resistance.
  6. Marine Applications: Incoloy 825 is employed in marine environments for components such as seawater-cooled heat exchangers, valves, and fittings.
  7. Pharmaceutical Industry: The alloy is used in pharmaceutical manufacturing equipment where resistance to corrosive chemicals and cleanliness are important.
Here is the chemical composition of Incoloy 825, presented in a tabular format:
  • Nickel

    (Ni)

    38.0% - 46.0%

  • Chromium

    (Cr)

    19.5% - 23.5%

  • Iron

    (Fe)

    22.0% min

  • Molybdenum

    (Mo)

    2.5% - 3.5%

  • Copper

    (Cu)

    1.5% - 3.0%

  • Titanium

    (Ti)

    0.6% - 1.2%

  • Aluminum

    (Al)

    0.2% - 0.8%

  • Silicon

    (Si)

    0.5% max

  • Carbon

    (C)

    0.05% max

  • Manganese

    (Mn)

    1.0% max

  • Sulfur

    (S)

    0.03% max

Here are the typical mechanical properties of Incoloy 825, presented in a tabular format:
Property Value
Tensile Strength 550 MPa (80,000 psi) minimum
Yield Strength (0.2% offset) 220 MPa (32,000 psi) minimum
Elongation 30% minimum
Hardness (Brinell) -
Modulus of Elasticity 207 GPa (30,000 ksi)