Haynes 188 (UNS R30188 / W.Nr. 2.4683) is a cobalt-based superalloy containing nickel, chromium, tungsten, and lanthanum. It is specially developed for extreme high-temperature applications where excellent mechanical strength, oxidation resistance, and hot corrosion resistance are required.

This advanced cobalt-nickel-chromium-tungsten alloy maintains outstanding tensile strength and creep resistance at elevated temperatures up to approximately 1100°C. It also provides excellent resistance to oxidizing environments up to 1095°C during long-term exposure, along with superior protection against sulfate deposit hot corrosion.

With a combination of high-temperature performance, corrosion resistance, and good fabrication characteristics, Haynes 188 is widely used in aerospace, gas turbine, heat treatment equipment, and other demanding industrial applications.

Key Features of Haynes 188 Alloy

Exceptional High-Temperature Strength

Haynes 188 maintains excellent tensile strength and creep resistance under extreme temperature conditions. Its stable mechanical performance at temperatures up to 1100°C makes it suitable for components exposed to continuous thermal stress and high-temperature environments.

Excellent Oxidation and Hot Corrosion Resistance

Thanks to its high chromium content and lanthanum addition, Haynes 188 demonstrates outstanding resistance to oxidation and aggressive hot corrosion environments.

The alloy performs particularly well against sulfate deposit hot corrosion, making it a reliable material choice for gas turbine components and other high-temperature applications where long-term durability is critical.

Good Fabrication Performance

Despite its high-temperature strength, Haynes 188 maintains good manufacturability compared with many other superalloys.

The alloy can be formed and welded using standard processing methods suitable for high-performance alloys, providing flexibility for complex component manufacturing.

Haynes 188 Chemical Composition

Haynes 188 Physical Properties

Haynes 188 Mechanical Properties

Haynes 188 provides a balanced combination of strength, ductility, and hardness, allowing it to maintain reliable mechanical performance under high-temperature operating conditions.

Available Sizes and Standards of Haynes 188

We supply Haynes 188 alloy in various forms and dimensions to meet different industrial requirements.

Available Standards:

• AMS 5772

• AMS 5608

Applications of Haynes 188 Alloy

Due to its excellent high-temperature strength and corrosion resistance, Haynes 188 is widely applied in industries requiring reliable performance under extreme operating conditions.

Typical applications include:

Aerospace Industry

Used for high-temperature aerospace components where strength retention and oxidation resistance are essential.

Gas Turbine Engines

Commonly used in military and commercial gas turbine engines, especially combustion cans and other hot-section components.

Gas Turbine Operations

Suitable for turbine systems operating under continuous thermal cycling and corrosive environments.

Heat Treatment Equipment

Applied in high-temperature processing equipment requiring excellent oxidation resistance and structural stability.

Available Haynes 188 Product Forms

Haynes 188 Nickel Coil

UNS R30188

Available for applications requiring flexible processing, precision fabrication, and high-temperature performance.

Haynes 188 Nickel Plate / Sheet

UNS R30188

Suitable for manufacturing structural components and high-temperature equipment parts.

Haynes 188 Nickel Strip / Nickel Foil

UNS R30188

Used for precision applications requiring thin alloy materials with excellent thermal stability.

Haynes 188 Nickel Bar / Wire Rod

UNS R30188

Available for machining, welding, and specialized high-temperature component manufacturing.

Haynes 188 (UNS R30188 / W.Nr. 2.4683) provides an ideal combination of high-temperature strength, oxidation resistance, corrosion resistance, and fabrication capability, making it a trusted cobalt-based superalloy solution for aerospace, turbine, and advanced industrial applications.