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ASTM B407 NiFeCr alloy seamless pipe and tube are high-performance nickel-iron-chromium alloy products designed for elevated temperature and corrosive industrial environments. Produced in accordance with standards established by ASTM International, these seamless alloy pipes offer excellent oxidation resistance, creep strength, and structural stability under prolonged high-temperature exposure.
Commonly manufactured in UNS N08800, N08810, and N08811 grades, ASTM B407 alloy tubes are widely used in petrochemical processing, nuclear power systems, heat exchangers, and furnace components. As a professional alloy pipe manufacturer and global exporter, we provide precision-engineered seamless NiFeCr tubes with strict quality assurance and international inspection compliance.
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ASTM B407 NiFeCr Alloy Pipe Specifications
| Parameter | Metric | Imperial |
|---|---|---|
| Outer Diameter | 6 – 508 mm | 1/8" – 20" |
| Wall Thickness | 0.8 – 40 mm | SCH 10 – SCH XXS |
| Length | Up to 12 m | Up to 40 ft |
| Manufacturing | Seamless Hot Rolled / Cold Drawn | Seamless |
| Heat Treatment | Solution Annealed | Solution Annealed |
| Surface | Pickled / Bright Annealed | Pickled |
Equivalent Standards
ASTM B407
ASTM B163
ASTM B423
EN 10216-5
DIN 17460
Applications of ASTM B407 NiFeCr Alloy Tube
Petrochemical furnace tubes
Heat exchanger tubing
Nuclear steam generator systems
Industrial gas turbine components
Chemical processing equipment
High temperature structural piping
Manufacturing Process
Raw material inspection
Hot extrusion forming
Cold drawing precision sizing
Solution annealing heat treatment
Surface pickling & passivation
Non-destructive testing
Technical Comparison
ASTM B407
Designed for creep-resistant high temperature service
Optimized grain structure stability
Strong oxidation resistance
👉 Typical use:
Furnace radiant tubes
Nuclear steam generator piping
Petrochemical heaters
ASTM B163
Covers wide range of nickel corrosion-resistant alloys
Not limited to high temperature alloy family
Strong in chloride & chemical resistance
👉 Typical use:
Heat exchanger tubing
Condenser tubes
Chemical processing
ASTM B423
Mainly covers Ni-Fe alloy tubing
Lower creep strength vs B407
Positioned between B163 & B407
👉 Typical use:
Boiler tubing
Industrial heat transfer
ASTM B407 NiFeCr Alloy Seamless Pipe and Tube Chemical requirements
ASTM B407 NiFeCr Alloy Seamless Pipe and Tube mechanical properties
ASTM B407 NiFeCr Alloy Seamless Pipe and Tube permissible variations
ASTM B407 NiFeCr Alloy Seamless Pipe and Tube schedules
ASTM B407 NiFeCr Alloy Seamless Pipe and Tube mechanical properties
ASTM B407 NiFeCr Alloy Seamless Pipe and Tube permissible variations
Product Form
Cold-Worked and Annealed: The tube/pipe is formed at room temperature, which increases its strength, and then annealed (heat-treated) to relieve stresses and achieve the desired mechanical properties and microstructure.
Hot-Finished and Annealed: The tube/pipe is formed at high temperatures and then annealed. This is typically for larger diameters or thicker walls where cold-working is not practical
Covered Alloys (UNS Numbers)
The standard covers the following nickel-alloys, which are known for their excellent resistance to oxidation and carburization at high temperatures:
UNS N08120: A more modern, high-strength alloy with excellent resistance to carburization and oxidation. Often used in extremely high-temperature furnace components.
UNS N08800, N08801, N08810, N08811: These are variations of the popular "Incoloy 800" series.
N08800 (Incoloy 800): The base composition.
N08810 & N08811 (Incoloy 800H/800HT): These are controlled versions of 800 with higher carbon content and specific heat treatments for improved high-temperature creep rupture strength.
UNS N08890 (Incoloy 890): Similar to the 800 series but with higher chromium and nickel for improved corrosion resistance.
UNS N06811 (Inconel 601): A nickel-chromium alloy with excellent resistance to high-temperature oxidation and good mechanical properties.
FAQ – ASTM B407 NiFeCr Alloy Seamless Pipe And Tube
What is ASTM B407 NiFeCr alloy pipe used for?
ASTM B407 NiFeCr alloy seamless pipes are mainly used in high-temperature and high-pressure industrial environments such as petrochemical furnaces, nuclear power systems, heat exchangers, and gas turbines.
Which alloy grades are covered under ASTM B407?
Common grades include UNS N08800 (Alloy 800), UNS N08810 (Alloy 800H), and UNS N08811 (Alloy 800HT), all designed for elevated temperature structural applications.
What is the maximum service temperature of ASTM B407 pipes?
ASTM B407 NiFeCr alloy pipes can typically operate at temperatures up to approximately 1100°C, depending on service conditions and alloy grade.
Is ASTM B407 pipe seamless or welded?
The specification issued by ASTM International primarily covers seamless nickel alloy pipe and tube, ensuring high structural integrity for critical applications.
What is the difference between Alloy 800, 800H, and 800HT?
Alloy 800 → General high-temperature service
Alloy 800H → Controlled carbon for improved creep strength
Alloy 800HT → Enhanced aluminum & titanium for superior creep resistance
Can ASTM B407 be used in nuclear applications?
Yes. ASTM B407 NiFeCr alloy tubes are widely used in nuclear steam generator systems due to their excellent high-temperature strength and oxidation resistance.
Is ASTM B407 suitable for corrosive environments?
Yes. The Ni-Fe-Cr composition provides good resistance to oxidation, carburization, and certain chemical corrosion environments.
What heat treatment is required for ASTM B407 tubes?
ASTM B407 pipes are typically supplied in the solution annealed condition to ensure optimal microstructure and mechanical performance.
What testing methods are used for ASTM B407 alloy pipes?
Common inspections include:
PMI (Positive Material Identification)
Ultrasonic testing (UT)
Eddy current testing (ET)
Hydrostatic testing
Dimensional inspection
What industries commonly use ASTM B407 NiFeCr alloy tubes?
Major industries include:
Petrochemical processing
Power generation
Nuclear energy
Furnace manufacturing
Chemical processing plants
How does ASTM B407 differ from ASTM B163?
ASTM B407 is mainly designed for high-temperature structural service, while ASTM B163 covers a wider range of nickel alloys used primarily for heat exchanger and corrosion-resistant tubing.
Can ASTM B407 pipes be customized for export projects?
Yes. Manufacturers typically provide customized dimensions, heat treatment conditions, inspection standards, and export packaging based on project requirements.
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