ASTM B407 specifies NiFeCr alloy seamless pipes and tubes suitable for high-temperature and corrosive environments. These pipes are part of the Incoloy-type alloy family, designed for chemical processing, marine, oil & gas, and power generation industries.
Understanding ASTM B407 standards and equivalent specifications helps engineers, buyers, and exporters select the correct material for global projects and compliance with international codes.
ASTM B407 Standard Highlights
Scope: Seamless pipes and tubes made of nickel-iron-chromium alloys.
Applications: Heat exchangers, boilers, chemical reactors, marine systems.
Chemical Composition: Ni, Fe, Cr, Mo, Cu, with trace elements.
Mechanical Properties: High tensile and yield strength, excellent fatigue and creep resistance.
Testing Requirements:
Chemical analysis
Mechanical testing (tensile, elongation, hardness)
Non-destructive testing (ultrasonic, eddy current, hydrostatic)
Certification: Mill Test Certificates (MTC), ISO 9001 compliance
Equivalent Specifications and International Standards
| Region / Standard | Equivalent Grade / Standard | Notes |
|---|---|---|
| ASTM (USA) | B407 | Original NiFeCr seamless pipe standard |
| ASTM (USA) | B163, B423 | High-temp NiFeCr alloys with specific corrosion resistance |
| ASME (USA) | SB407 | Pressure piping equivalent |
| EN (Europe) | EN 2.4600 (Alloy 800) | Similar nickel-iron-chromium composition |
| JIS (Japan) | SUS 3300 Series | Nickel-iron-chromium alloy equivalent |
| GB (China) | GB/T 15173 Alloy 800 | Domestic NiFeCr seamless pipe standard |
| DIN (Germany) | DIN 17455 Alloy 800 | Nickel-iron-chromium high-temperature corrosion-resistant tubes |
Note: Equivalent standards differ slightly in chemical composition, mechanical properties, and temperature ratings, so selection must consider project requirements.
Chemical Composition (Typical for ASTM B407)
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 39–42 |
| Iron (Fe) | 27–31 |
| Chromium (Cr) | 20–23 |
| Molybdenum (Mo) | 1–2 |
| Copper (Cu) | 0.5–1 |
| Carbon (C) | 0.08 max |
| Other Elements | Mn, Si, P (Trace) |
Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength | 75–110 ksi (520–760 MPa) |
| Yield Strength | 30–60 ksi (210–415 MPa) |
| Elongation | 30–50% |
| Hardness | 150–200 HB |
| Service Temperature | Up to 593°C (1100°F) |
Key Features & Advantages
High Corrosion Resistance: Protects against oxidizing and reducing chemicals.
Excellent High-Temperature Performance: Suitable for boilers, heat exchangers, and superheaters.
Seamless Construction: Provides high pressure and stress resistance.
Stress-Corrosion Resistant: Ideal for chemical and marine industries.
Global Standard Compliance: Compatible with ASTM, ASME, EN, JIS, DIN, GB.
Products Applications
Chemical Industry: Reactors, piping, heat exchangers for sulfuric, hydrochloric, nitric acids.
Power Generation: Boilers, superheaters, nuclear and fossil fuel plants.
Marine & Offshore: Seawater piping, desalination plants, offshore platforms.
Oil & Gas: Sour gas pipelines, high-pressure oil transport.
Aerospace & Automotive: Turbine components, exhaust systems.
Inspection & Quality Assurance
Chemical Analysis: Spectrometry for composition compliance.
Mechanical Testing: Tensile, yield, elongation, and hardness.
Non-Destructive Testing: Ultrasonic, eddy current, hydrostatic tests.
Third-Party Verification: MTC, ISO 9001, and API compliance if required.
Export Packaging: Standardized for safe international shipment.
FAQ
What is ASTM B407?
ASTM B407 specifies seamless pipes and tubes made from NiFeCr alloys, suitable for corrosion-resistant and high-temperature applications in chemical, power, marine, and oil & gas industries.
What are the main differences between ASTM B407, B163, and B423?
B407: Standard corrosion-resistant NiFeCr alloy pipes.
B163: Higher-temperature applications with improved mechanical strength.
B423: Optimized for extreme high-temperature and corrosive environments, including aerospace and offshore projects.
Are there international equivalents to ASTM B407?
Yes. Common equivalents include:
ASME SB407 (USA)
EN 2.4600 / Alloy 800 (Europe)
JIS SUS 3300 Series (Japan)
GB/T 15173 Alloy 800 (China)
DIN 17455 Alloy 800 (Germany)
Can ASTM B407 pipes withstand seawater or marine environments?
Yes. ASTM B407 offers excellent corrosion resistance in both seawater and acidic chemical environments. For long-term offshore exposure, B423 or N08811 equivalents may be preferred.
What sizes and forms are available?
ASTM B407 pipes are typically available as seamless tubes and pipes, with customizable:
Outer diameter
Wall thickness
Length
Heat treatment condition (annealed or solution-treated)
What industries commonly use ASTM B407 pipes?
Chemical processing – reactors, heat exchangers, piping for acids
Power generation – boilers, superheaters, nuclear and fossil fuel plants
Marine & offshore – seawater piping, desalination systems
Oil & gas – sour gas pipelines, high-pressure lines
Aerospace & automotive – turbine components, exhaust systems
Do ASTM B407 pipes come with certification?
Yes. Standard supply includes Mill Test Certificates (MTC). Third-party inspection and ISO 9001 compliance are also available.
Can ASTM B407 pipes be welded?
Yes, but specialized welding procedures for nickel-based alloys are required to maintain corrosion resistance and mechanical integrity.
What is the maximum service temperature for ASTM B407?
ASTM B407 seamless pipes are suitable for up to 593°C (1100°F), depending on wall thickness and operating conditions.
How do I choose the right ASTM B407 equivalent for my project?
Consider:
Operating temperature and pressure
Corrosive media (oxidizing vs. reducing acids, sulfides)
Mechanical stress
Industry requirements and applicable international standards
What is the expected service life of ASTM B407 pipes?
With proper selection and maintenance, service life can range from 15 to 25 years, depending on operating conditions and chemical exposure.
Are ASTM B407 pipes suitable for high-pressure applications?
Yes. Seamless construction ensures high pressure and stress resistance, making them suitable for chemical reactors, steam lines, and offshore pipelines.
