ASTM B163 Incoloy 800H UNS N08810 Seamless Nickel Alloy Tube Heat Exchanger Tube

ASTM B163 / ASME SB163 UNS N08810 / Incoloy 800H Seamless Nickel Alloy Tube

ASTM B163/ASME SB163 is the standard specification for seamless nickel and nickel-alloy condenser and heat-exchanger tubes. UNS N08810, commonly known as Incoloy 800H, is a nickel-iron-chromium alloy optimized for high-temperature performance through controlled carbon content and stabilization. The material 800H / UNS N08810 is the go-to choice for high-temperature, high-stress applications where corrosion resistance, thermal stability, and long-term durability are essential. It bridges the gap between stainless steels and more expensive nickel alloys, offering exceptional performance in demanding thermal and chemical environments.

Mian Features of Incoloy 800/ 800H/ 800HT three alloys.

1. Corrosion Resistance

• Excellent and consistent oxidation, carburization, and sulfidation resistance at high temperatures.

• High nickel content provides strong resistance to stress corrosion cracking, especially in chloride environments.

• Well-suited for aggressive chemical and high-temperature aqueous applications.

2. High-Temperature Stability

• Maintains structural integrity under extreme heat through solid-solution strengthening and creep resistance.

• High melting point and controlled thermal expansion prevent deformation.

• Protects against degradation, ensuring durability in thermally demanding environments.

3. Resistance to Carburization

• Specifically designed to inhibit carbon diffusion in high-temperature, carbon-rich atmospheres.

• Optimized alloy composition and surface passivation provide long-term protection against carburization.

• Preserves material integrity and extends service life in applications such as furnace components and reformer tubes.

Applications

Chemical Processing

Marine and offshore engineering

Aerospace

Heat Exchangers

Food & Beverage

Semiconductor Manufacturing.