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Alloy Portfolio

Nickel 800 H/HT

Incoloy 800H/HT is a family of high-nickel alloys known for their excellent high-temperature strength, corrosion resistance, and good mechanical properties. These alloys are part of the Incoloy series, which is a group of nickel-iron-chromium alloys. Incoloy 800H and Incoloy 800HT are variations of the Incoloy 800 alloy with specific modifications to enhance certain properties.

Key Characteristics of Incoloy 800H/HT:

  1. High Temperature Strength: Incoloy 800H offers high-temperature strength suitable for applications in elevated temperature environments.
  2. Corrosion Resistance: The alloy provides good corrosion resistance in various environments, making it suitable for applications in chemical and petrochemical industries.
  3. Oxidation Resistance: Incoloy 800H has excellent resistance to oxidation, which is essential for applications at elevated temperatures.
  4. Good Formability: The alloy exhibits good formability and can be easily fabricated through various processes, including forging, welding, and machining.
  5. Stability under Duress: Incoloy 800H maintains its mechanical properties under duress, such as in cyclic loading conditions.

Applications of Incoloy 800 H/HT:

  1. Chemical and Petrochemical Industries: Incoloy 800H is commonly used in applications involving exposure to corrosive chemicals and high temperatures, such as in heat exchangers, furnace components, and petrochemical processing units.
  2. Power Generation: The alloy finds applications in power generation systems, including components in boilers and heat exchangers.
  3. Industrial Furnaces: Incoloy 800H is suitable for use in industrial furnaces due to its high-temperature strength and oxidation resistance.

Incoloy 800HT

Incoloy 800HT is an extension of Incoloy 800H with higher carbon content, designed for enhanced high-temperature properties.

Key Characteristics Incoloy 800HT

  1. Higher Temperature Capability: Incoloy 800HT is specifically designed for applications requiring higher temperature capabilities compared to Incoloy 800H.
  2. Maintained Corrosion Resistance: Similar to Incoloy 800H, Incoloy 800HT maintains good corrosion resistance in various environments.

Applications of Incoloy 800HT

  1. High-Temperature Applications: Incoloy 800HT is chosen for applications requiring sustained high-temperature strength, such as in high-temperature furnace components and petrochemical processing.
  2. Heat Treatment Equipment: The alloy is suitable for use in heat treatment equipment, including fixtures and furnace components.
Here is the chemical composition of Incoloy 800H/HT, presented in a tabular format
  • Nickel

    (Ni)

    30.0% - 35.0%

  • Chromium

    (Cr)

    19.0% - 23.0%

  • Iron

    (Fe)

    39.5% min

  • Aluminum

    (AI)

    0.15% - 0.60%

  • Titanium

    (Ti)

    0.15% - 0.60%

  • Carbon

    (C)

    0.05% - 0.10%

  • Copper

    (Cu)

    0.75% max

  • Manganese

    (Mn)

    1.5% max

  • Silicon

    (Si)

    1.0% max

  • Sulfur

    (S)

    0.015% max

  • Phosphorus

    (P)

    0.015% max

Here are the typical mechanical properties of Incoloy 800H/HT, presented in tabular form:
Property Value
Tensile Strength 600 MPa (87,000 psi) minimum (800H), 690 MPa (100,000 psi) minimum (800HT)
Yield Strength (0.2% offset) 210 MPa (30,000 psi) minimum (800H), 450 MPa (65,000 psi) minimum (800HT)
Elongation 30% minimum (800H), 30% minimum (800HT)
Hardness (Brinell) Not typically specified
Modulus of Elasticity 200 GPa (29,000 ksi)