ASTM B407 UNS N08810 Nickel Alloy Steel Heat Exchanger Tube In Air Cooler

ASTM B407 UNS N08810 is a high-performance nickel-based alloy specifically engineered for heat exchanger tubes and industrial applications requiring exceptional resistance to high-temperature corrosion, oxidation, and stress. This alloy belongs to the family of nickel alloys renowned for their superior performance in aggressive environments.

ASTM B407 specifies requirements for nickel-alloy seamless and welded tubes, particularly for heat transfer applications including heat exchangers and condensers.

UNS N08810 designates a high-chromium nickel alloy ideally suited for heat exchanger applications and similar demanding environments.

• Nickel (Ni): 35-46% (primary element)
• Chromium (Cr): 19-23% (provides high-temperature oxidation resistance)
• Iron (Fe): Approximately 20% (balances mechanical properties)
• Molybdenum (Mo): 2.5-3% (enhances pitting and crevice corrosion resistance)
• Other Elements: Silicon, manganese, and trace elements for improved workability and corrosion resistance

• High Strength: Maintains excellent mechanical strength at elevated temperatures
• Ductility & Toughness: Resistant to cracking or fracture under stress
• Stress Corrosion Cracking Resistance: Superior performance in sulfuric acid and chloride environments

UNS N08810 operates effectively at elevated temperatures up to 1100°F (593°C), with variations depending on specific environmental conditions. The alloy maintains its mechanical properties in both high-temperature oxidizing environments and moderate-temperature corrosive atmospheres.