HAYNES 188, also known as UNS R30188 or AMS 5608, is a high-temperature, high-strength nickel-cobalt-chromium alloy. It is recognized under ISO 6208, ensuring compliance with international standards for quality and performance.

HAYNES 188 is designed for applications requiring exceptional high-temperature strength and oxidation resistance. Its unique composition makes it suitable for use in demanding environments where high performance and durability are essential.

Haynes 188 Sheet | Plate

HAYNES 188 sheets and plates are available in various thicknesses and dimensions. These materials are used in applications requiring high strength and excellent resistance to thermal stresses, such as in aerospace and industrial settings.

Haynes 188 Round Bar | Rod

HAYNES 188 round bars and rods are available in different diameters and lengths. These products are essential for precision machining and manufacturing components that must withstand high stresses and temperatures.

Haynes 188 Strip | Coil

Available in strips and coils, HAYNES 188 is suitable for applications that require flexible, high-strength materials. These forms are often used for producing gaskets, seals, and other components that need to perform reliably in demanding conditions.

Haynes 188 Applications

• HAYNES 188 is extensively used in aerospace applications for components such as turbine blades, exhaust systems, and other parts where high-temperature strength and oxidation resistance are crucial.

Haynes 188 Properties

• Tensile Strength: HAYNES 188 exhibits high tensile strength, making it ideal for components subjected to significant mechanical stress at elevated temperatures.
• Density: Approximately 8.6 g/cm³, providing a favorable strength-to-weight ratio for demanding applications.
• Thermal Conductivity: Moderate thermal conductivity ensures stability and performance under high-temperature conditions.
• Oxidation Resistance: The alloy offers excellent resistance to oxidation and scaling at high temperatures, extending the lifespan of components.
• Corrosion Resistance: HAYNES 188 has superior resistance to a range of corrosive environments, including acidic and basic conditions.

Machining Haynes 188

• Cutting: HAYNES 188 can be cut using high-speed steel or carbide tools. Techniques such as water jet cutting or laser cutting are recommended for precision work.
• Drilling: Use carbide or cobalt drills for drilling HAYNES 188. Proper cooling and lubrication are essential to maintain tool life and ensure accurate drilling.
• Turning: Carbide inserts are preferred for turning HAYNES 188. Consistent cutting speeds and high-pressure cooling are crucial for achieving optimal results.
• Milling: Milling operations should use carbide end mills with adequate cooling to manage heat and maintain precision during processing.
• Grinding: For grinding HAYNES 188, use diamond or CBN wheels to achieve precise tolerances and a high-quality surface finish. Adequate cooling is necessary to prevent overheating and maintain dimensional accuracy.

Chemical Composition

• Carbon (C): Min 0.05%, Max 0.15%
• Manganese (Mn): Max 1.25%
• Phosphorus (P): Max 0.02%
• Sulfur (S): Max 0.02%
• Silicon (Si): Min 0.20%, Max 0.50%
• Chromium (Cr): Min 20.0%, Max 24.0%
• Nickel (Ni): Min 20.0%, Max 24.0%
• Cobalt (Co): Min 39%
• Boron (B): Max 0.015%
• Iron (Fe): Max 3.00%
• Tungsten (W): Min 13.0%, Max 16.0%
• Lanthanum (La): Min 0.03%, Min 0.12%