ASTM B167 is the standard specification for *Nickel-Chromium-Iron Alloy (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696) Seamless Pipe and Tube.
This standard covers a family of high-performance nickel-chromium-based alloys known for their exceptional resistance to oxidation, corrosion, and high-temperature strength.
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ASTM B167 Nickel Alloy Covered Alloys (UNS Numbers)
A. Nickel-Chromium-Iron Alloys:
UNS N06600 (Inconel 600): The classic nickel-chromium-iron alloy with excellent resistance to oxidation and corrosion.
UNS N06601 (Inconel 601): Enhanced with aluminum for superior oxidation resistance and high-temperature strength.
UNS N06690 (Inconel 690): High chromium content for exceptional resistance to stress-corrosion cracking and corrosion in caustic environments. Critical for nuclear steam generator tubes.
UNS N06693 (Inconel 693): Excellent resistance to sulfidation, oxidation, and carburization.
UNS N06025 (Haynes 242): Known for high strength and a low coefficient of thermal expansion.
UNS N06045 (Haynes HR-160): Excellent resistance to sulfidation and other forms of hot corrosion.
UNS N06696: A newer alloy designed for very high temperature stability.
B. Nickel-Chromium-Cobalt-Molybdenum Alloy:
UNS N06617 (Inconel 617): A versatile alloy with excellent high-temperature strength, oxidation resistance, and creep resistance, largely due to its cobalt and molybdenum content.
ASTM B167 Nickel Alloy Chemical requirements
ASTM B167 Nickel Alloy mechanical properties
ASTM B167 Nickel Alloy mechanical properties
ASTM B167 Nickel Alloy permissible variations
ASTM B167 Nickel Alloy tolerances
ASTM B167 Nickel Alloy pipe schedules
Product Form and Condition
Form: Seamless pipe and tube.
Condition:
Cold-Worked and Annealed: For higher strength and finer surface finish.
Hot-Worked and Annealed: For larger sizes or heavier walls.
Hot-Finished and Annealed: Similar to hot-worked, involving forming at high temperatures followed by a mandatory anneal.
The annealed condition is crucial as it ensures the material has a uniform microstructure, optimal ductility, and the desired corrosion-resistant properties.
Products Applications
Heat Exchangers and Condensers in aggressive chemical environments.
Nuclear Reactor Components (especially UNS N06690).
Industrial Furnace Components (radiant tubes, muffles).
Gas Turbine Components and other high-temperature aerospace parts.
Petrochemical Processing equipment.
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