Haynes 188 (UNS R30188): Your Premier High-Temperature Alloy Under AMS 5608H

In the demanding worlds of aerospace, industrial gas turbines, and advanced energy systems, component failure is not an option. Materials are pushed to their absolute limits by intense heat, corrosive environments, and significant mechanical stress. It is in these extreme conditions that Haynes 188, a cobalt-nickel-chromium-tungsten superalloy, proves its exceptional value. At ZYTC Alloy, we specialize in the standardized, streamlined, and professional production of this premier material, ensuring every shipment, like our recent order of Haynes 188 plate to Japan, meets the most rigorous international specifications such as AMS 5608H.

Our commitment to excellence is reflected in our ability to deliver high-quality Haynes 188 in various forms—including plate, sheet, strip, wire, bar, and related fabricated products—with fast lead times and competitive pricing, all while strictly adhering to ASTM, EN, and AMS standards.

Haynes 188 Chemical Composition: The Foundation of Excellence

The outstanding properties of Haynes 188 alloy are rooted in its carefully balanced chemistry, as defined by AMS 5608. This composition provides a unique combination of high-temperature strength, exceptional oxidation resistance, and good fabricability.

• Cobalt (Co) Balance: Provides the fundamental matrix with excellent inherent thermal fatigue resistance.

• Chromium (Cr) 20.0-24.0%: Imparts superior oxidation and sulfidation resistance at high temperatures by forming a protective oxide scale.

• Nickel (Ni) 20.0-24.0%: Stabilizes the austenitic structure, enhancing ductility and toughness.

• Tungsten (W) 13.0-15.0%: Serves as a primary solid-solution strengthener, crucial for maintaining creep strength and elevated temperature performance.

• Lanthanum (La) 0.03-0.15%: A key addition that drastically improves the adhesion of the protective oxide scale under cyclic heating and cooling conditions, significantly extending service life.

• Carbon (C), Iron (Fe), Manganese (Mn), Silicon (Si): Controlled minor elements that influence strength and processability.

Haynes 188 Mechanical & Physical Properties: Engineered for Extremes

Haynes 188 is designed to perform where other materials falter. Its key properties make it indispensable for high-heat applications.

• Exceptional High-Temperature Strength: It retains a significant portion of its room-temperature strength well above 1000°C (1800°F), offering outstanding short-term tensile properties and long-term creep resistance.

• Superior Oxidation Resistance: The alloy resists degradation in oxidizing atmospheres up to 1150°C (2100°F), far exceeding the capabilities of common stainless steels.

• Good Fabricability: Despite its high strength, Haynes 188 can be formed, machined, and welded using standard techniques for high-temperature alloys, allowing for the manufacture of complex components.

Primary Applications of Haynes 188 Alloy

The unique property profile of Haynes 188 cobalt alloy makes it the material of choice for critical components in several industries:

• Aerospace & Jet Engines: Combustion chamber liners, transition ducts, afterburner components, and turbine seals.

• Industrial Gas Turbines: Used for combustor parts, flame holders, and hot gas path components requiring thermal fatigue resistance.

• Heat Treatment & Energy Sector: Applications include furnace fixtures, radiant tubes, and components in advanced nuclear reactors.

ZYTC Alloy: Your Trusted Supplier for High-Performance Alloys
Our recent export of Haynes 188 plate (specification: 9*197*771MM), produced and inspected under our rigorous standardized process, stands as a testament to our capability. We deliver AMS 5608H compliant materials that pass stringent final inspection, guaranteeing high quality and reliability for your most challenging engineering projects. Contact us to discuss how our Haynes 188 products can provide a solution for you.

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