ASTM B167 Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06690,N06025 and N06045) Inconel Tube , Inconel 600 Pipe / Inconel 601 Tube
ASTM B167 Inconel tubes and pipes are nickel-chromium-iron alloy seamless and welded products designed for high-temperature and corrosive service. Covering grades UNS N06600 (Inconel 600), UNS N06601 (Inconel 601), UNS N06690, UNS N06025, and UNS N06045, ASTM B167 tubes offer excellent resistance to oxidation, carburization, nitriding, and stress corrosion cracking.
These alloys are widely used in heat treatment furnaces, chemical processing, power generation, and petrochemical industries.
What Is ASTM B167?
ASTM B167 is the standard specification for seamless and welded nickel-chromium-iron alloy tubes and pipes intended for general corrosion-resistant and high-temperature service.
The standard defines:
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Chemical composition
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Mechanical properties
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Heat treatment conditions
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Dimensional tolerances
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Testing and inspection requirements
Standard Specification for Nickel-Chromium-Aluminum Alloys (UNS N06699), Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, N06045, and N06696), Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617), Nickel-Iron-Chromium-Tungsten Alloy (UNS N06674), and Nickel-Chromium-Molybdenum-Copper Alloy (UNS N06235) Seamless Pipe and Tube
Product Forms – ASTM B167
ASTM B167 Inconel products are supplied as:
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Seamless tubes
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Welded tubes
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Pipes for pressure and non-pressure service
Size Range & Specifications
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Outside Diameter: 6 mm – 219 mm (1/4″ – 8″)
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Wall Thickness: 0.5 mm – 12 mm (or as specified)
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Manufacturing: Seamless hot finished / cold drawn / welded
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Delivery Condition: Solution annealed
| Element | Alloy N06600 | Alloy N06601 | Alloy N06690 | Alloy N06025 | Alloy N06045 |
| Nickel | 72.0 min | 58.0-63.0 | 58.0 min | Remainer | 45.0 min |
| Chromium | 14.0-17.0 | 21.0-25.0 | 27.0-31.0 | 24.0-26.0 | 26.0-29.0 |
| Iron | 6.0-10.0 | Remainder | 7.0-11.0 | 8.0-11.0 | 21.0-25.0 |
| Manganese | 1.0 max | 1.5 max | 0.5 max | 0.15 max | 1.0 max |
| Aluminum | 1.0-1.7 | 1.8-2.4 | |||
| Carbon | 0.15 max | 0.10 max | 0.05 max | 0.15-0.25 | 0.05-0.12 |
| Copper | 0.5 max | 1.0 max | 0.5 max | 0.1 max | 0.3 max |
| Silicon | 0.5 max | 0.5 max | 0.5 max | 0.5 max | 2.5-3.0 |
| Sulfur | 0.015 max | 0.015 max | 0.015 max | 0.010 max | 0.010 max |
| Titanium | 0.1-0.2 | ||||
| Phosphorous | 0.020 max | 0.020 max | |||
| Zirconium | 0.01-0.10 | ||||
| Yttrium | 0.05-0.12 | ||||
| Cerium | 0.03-0.09 | ||||
| Nitrogen | 0.05-0.12 |
| ASTM B161 – ASME SB161 – ‘Specification for Nickel Seamless Pipe and Tube’ ASTM B165 – ASME SB165 – ‘Specification for Nickel-Copper Alloy (UNS N04400) Seamless Pipe and Tube’ ASTM B167 – ASME SB167 – ‘Specification for Nickel-Chromium-Iron Alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025 and N06045) and Nickel-Chromium-Cobalt-Molybdenum Alloy (UNS N06617) Seamless Pipe and Tube’ ASTM B407 – ASME SB407 – ‘Specification for Nickel-Iron-Chromium Alloy Seamless Pipe and Tube’ ASTM B423 – ASME SB423 – ‘Specification for Nickel-Iron-Chromium-Molybdenum-Copper Alloy (UNS N08825 abd N08221) Seamless Pipe and Tube’ ASTM B622 – ASME SB622 – ‘Specification for Seamless Nickel and Nickel-Cobalt Alloy Pipe and Tube’ ASTM B725 – ASME SB725 – ‘Specification for Welded Nickel and Nickel-Copper Alloy Pipe’ ASTM A165 ASME SB165 – ‘Standard Specification for Nickel-Copper Alloy Seamless Pipes and Tubes’ ASTM B619 – ASME SB619 – ‘Specification for Welded Nickel and Nickel-Cobalt Alloy Pipe’ASME B36.10 – ‘Welded and Seamless Wrough Steel Pipe’ ASME B36.19 – ‘Stainless Steel Pipe’  |
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Heat Treatment
ASTM B167 Inconel tubes and pipes are supplied in solution annealed condition, followed by rapid cooling to ensure:
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Uniform microstructure
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Maximum corrosion resistance
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Stable mechanical properties
Testing & Inspection
ASTM B167 Inconel tubes are subject to:
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Chemical analysis
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Tensile testing
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Flattening / flaring tests
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Eddy current or hydrostatic testing
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Dimensional inspection
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Certification: EN 10204 3.1 / 3.2 (upon request)
ASTM B167 Inconel tubes and pipes made from UNS N06600, N06601, N06690, N06025, and N06045 provide reliable performance in high-temperature and corrosive environments. With excellent oxidation resistance, mechanical stability, and compliance with ASTM B167, Inconel 600 pipes and Inconel 601 tubes are trusted solutions for critical industrial applications.
Related Products
ASTM B167 N06601 Nickel Alloy tubes
