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Alloy Portfolio

Nickel C-22

Hastelloy C-22 is a versatile nickel-chromium-molybdenum-tungsten alloy known for its exceptional corrosion resistance in a wide range of aggressive chemical environments. It belongs to the Hastelloy family of alloys, which are designed to provide high performance in corrosive conditions. Hastelloy C-22 is an improved version of Hastelloy C-276 and exhibits superior resistance to pitting, crevice corrosion, and stress corrosion cracking.

Key Characteristics of NICKEL C-22:

  1. Outstanding Corrosion Resistance: Hastelloy C-22 offers excellent resistance to a variety of corrosive media, including oxidizing and reducing environments. It is highly resistant to pitting, crevice corrosion, and stress corrosion cracking.
  2. Versatility: This alloy is well-suited for use in a wide range of chemical process applications where exposure to aggressive chemicals is common.
  3. Resistance to Chloride-induced Corrosion: Hastelloy C-22 has superior resistance to chloride-induced corrosion, making it suitable for applications in marine environments and industries using chloride-containing chemicals.
  4. Excellent Weldability: The alloy is easily weldable using various welding techniques, allowing for ease of fabrication and repair.
  5. High Temperature Stability: Hastelloy C-22 maintains its mechanical properties and corrosion resistance at elevated temperatures, making it suitable for applications involving high-temperature processing.
  6. Good Fabricability: The alloy is easily fabricated through various processes, including welding, forming, and machining.
  7. Low Work Hardening Rate: Hastelloy C-22 exhibits a low work hardening rate, making it suitable for cold working and forming operations.

Applications of NICKEL C-22:

  1. Chemical Processing: Hastelloy C-22 is widely used in the chemical processing industry for applications such as reactors, vessels, and pipes, where resistance to a wide range of corrosive chemicals is essential.
  2. Pharmaceutical Industry: The alloy is employed in pharmaceutical manufacturing equipment where resistance to corrosive chemicals and cleanliness are important.
  3. Pulp and Paper Industry: Used in various components in the pulp and paper industry, such as digesters and bleach plants, where resistance to corrosive chemicals is crucial.
  4. Marine Applications: Due to its resistance to chloride-induced corrosion, Hastelloy C-22 is used in marine applications, including components exposed to seawater.
  5. Oil and Gas Industry: Suitable for applications in the oil and gas sector, including components for downhole tools and wellhead equipment, where corrosion resistance is critical.
  6. Waste Treatment: Used in waste treatment facilities where exposure to aggressive chemicals is common.
Here is the chemical composition of Nickel C-22, presented in a tabular format
  • Nickel

    (Ni)

    56.0%

  • Chromium

    (Cr)

    20.0%

  • Molybdenum

    (Mo)

    13.0%

  • Tungsten

    (W)

    3.0%

  • Iron

    (Fe)

    3.0% max

  • Cobalt

    (Co)

    2.5% max

  • Manganese

    (Mn)

    0.50% max

  • Vanadium

    (V)

    0.35% max

  • Silicon

    (Si)

    0.08% max

  • Carbon

    (C)

    0.010% max

  • Phosphorus

    (P)

    0.020% max

  • Sulfur

    (S)

    0.020% max

Here are the typical mechanical properties of Hastelloy C22, presented in a tabular format:
Property Value
Tensile Strength 690 MPa (100,000 psi) minimum
Yield Strength (0.2% offset) 310 MPa (45,000 psi) minimum
Elongation 50% minimum
Hardness (Brinell) Not typically specified
Modulus of Elasticity 216 GPa (31,000 ksi)