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Alloy Portfolio

Nickel 693

Inconel 693 is a high-nickel, high-chromium alloy with the addition of aluminum and titanium, designed for exceptional resistance to high-temperature corrosion and oxidation. Comprising approximately 60% nickel, 30% chromium, and smaller amounts of aluminum, titanium, and other elements, Inconel 693 exhibits superior performance in harsh environments.

This alloy is particularly suitable for applications in which resistance to oxidation and carburization at elevated temperatures is crucial. Inconel 693 is commonly used in the production of furnace components, such as radiant tubes, and in applications involving heat treatment processes. Its robust corrosion resistance and thermal stability make Inconel 693 valuable in industries like petrochemical, aerospace, and furnace manufacturing, where exposure to extreme temperatures and corrosive conditions is a critical consideration.

Key Characteristics of Inconel 693:

  1. High Temperature Strength: Inconel 693 exhibits robust strength and resistance to deformation at elevated temperatures, making it suitable for applications in high-temperature environments.
  2. Excellent Oxidation Resistance: The alloy is known for its exceptional resistance to oxidation and scaling, making it suitable for use in atmospheres with high oxygen content, such as in combustion and thermal processing.
  3. Good Corrosion Resistance: Inconel 693 provides resistance to various corrosive environments, including acids and alkalis, enhancing its usability in chemical and petrochemical applications.
  4. Weldability: The alloy is generally weldable, allowing for ease of fabrication and repair using various welding techniques.

Applications of Inconel 693:

  1. Thermal Processing Equipment: Inconel 693 is often used in thermal processing equipment, including furnaces and high-temperature components, due to its high-temperature strength and oxidation resistance.
  2. Petrochemical Industry: The alloy may find applications in the petrochemical industry, particularly in environments involving high temperatures and corrosive substances.
  3. Gas Turbine Components: Inconel 693 can be used in components of gas turbines where high-temperature strength and resistance to oxidation are crucial for maintaining performance and integrity.
  4. Chemical Processing: Inconel 693 may be employed in chemical processing equipment, such as reactors and vessels, where resistance to both high temperatures and corrosive chemicals is necessary.
  5. Heat Treatment Furnaces: The alloy is suitable for use in heat treatment furnaces, where exposure to elevated temperatures and oxidative atmospheres is common.
Here is the chemical composition of Inconel 693, presented in a tabular format:
  • Nickel

    (Ni)

    70.0% min

  • Chromium

    (Cr)

    21.0% - 25.0%

  • Iron

    (Fe)

    7.0% - 11.0%

  • Molybdenum

    (Mo)

    3.0% - 4.0%

  • Titanium

    (Ti)

    2.5% - 3.5%

  • Aluminum

    (AI)

    0.5% - 1.5%

  • Cobalt

    (Co)

    1.0% max

  • Manganese

    (Mn)

    0.50% max

  • Silicon

    (Si)

    0.50% max

  • Carbon

    (C)

    0.05% max

  • Sulfur

    (S)

    0.015% max

  • Phosphorus

    (P)

    0.015% max

Here are the typical mechanical properties of Inconel 693, presented in tabular form:
Property Value
Tensile Strength 860 MPa (125,000 psi) minimum
Yield Strength (0.2% offset) 620 MPa (90,000 psi) minimum
Elongation 25% minimum
Hardness (Brinell) Not typically specified
Modulus of Elasticity 214 GPa (31,000 ksi)