ASTM B167
ASTM B167 Basic Info
ASTM B167 specifies the applications of seamless nickel-chromium-iron alloy pipes and tubes, including alloys like Inconel 600 (UNS N06600) and Inconel 601 (UNS N06601). These materials find extensive use in high-temperature and corrosive environments such as chemical processing plants, power generation facilities, and aerospace applications. With its stringent quality standards, ASTM B167 ensures the durability, reliability, and safety of these alloys in critical industrial processes and systems.
Characteristics of ASTM B167
- High Temperature Resistance: ASTM B167 materials exhibit excellent resistance to high temperatures, making them suitable for use in applications where elevated temperatures are encountered, such as in furnace components, heat exchangers, and gas turbines.
- Corrosion Resistance: These materials offer exceptional corrosion resistance in various environments, including acidic, alkaline, and high-chloride environments, making them ideal for use in chemical processing, marine, and offshore industries.
- Wide Range of Alloys: ASTM B167 covers a range of nickel-chromium-iron and nickel-chromium-cobalt-molybdenum alloys, providing options to meet specific performance requirements for different applications.
- Seamless Construction: The standard specifies seamless pipes and tubes, which offer superior strength and reliability compared to welded counterparts, particularly in high-pressure and high-temperature applications.
- Dimensional Precision: ASTM B167 outlines requirements for precise dimensions and tolerances of seamless pipes and tubes, ensuring uniformity and compatibility for use in various systems and assemblies.
- Mechanical Properties: While ASTM B167 does not directly specify mechanical properties, the materials covered typically exhibit high strength, good ductility, and excellent creep resistance, allowing them to withstand mechanical stresses and loads in demanding operating conditions.
ASTM B167 Data Sheet
Steel Grade
Dimensions and Tol.
Equivalent Steel Grades
Chemical Composition
Mechanical Properties
Steel Grade
UNS N06600
UNS N06601
UNS N06603
UNS N06690
UNS N06693
UNS N0625
UNS N0645
Dimensions and Tol.
Shape
- Round
Outside Diameter
- 0.405 inches (10.29 mm) to 8 inches (203.2 mm)
Wall Thickness
- 0.020 inches (0.51 mm) to 0.500 inches (12.7 mm)
Length
- Typically specified by the purchaser
Tolerances
- Diameter: +/- 0.005 inches (0.13 mm)
- Wall Thickness: +/- 10% or as agreed upon
- Length: +/- specified length or as agreed upon
Equivalent Steel Grades
United Kingdom
- Equivalent Grade(s): NA13 (UNS N04400), NA21 (UNS N06625)
- Standard: BS 3074
European Union
- Equivalent Grade(s): NiCu30Fe (UNS N04400), NiCr22Mo9Nb (UNS N06625)
- Standard: EN 10216-5
Japan
- Equivalent Grade(s): NW2200 (UNS N02200), NW6025 (UNS N06625)
- Standard: JIS G3459
Germany
- Equivalent Grade(s): 2.4360 (UNS N04400), 2.4856 (UNS N06625)
- Standard: DIN 17458
Chemical Composition
UNS N06600
- Nickel (Ni): 72.0% min
- Chromium (Cr): 14.0-17.0%
- Iron (Fe): 6.0-10.0%
UNS N06601
- Nickel (Ni): 58.0-63.0%
- Chromium (Cr): 21.0-25.0%
- Iron (Fe): Balance
UNS N06625
- Nickel (Ni): –
- Chromium (Cr): 20.0-23.0%
- Iron (Fe): Balance
- Molybdenum (Mo): 8.0-10.0%
UNS N06690
- Nickel (Ni): –
- Chromium (Cr): 27.0-31.0%
- Iron (Fe): Balance
UNS N06693
- Nickel (Ni): –
- Chromium (Cr): 30.0-33.0%
- Iron (Fe): Balance
UNS N0625
- Nickel (Ni): –
- Cobalt (Co): 22.0-24.0%
- Molybdenum (Mo): 8.0-10.0%
UNS N0645
- Nickel (Ni): –
- Cobalt (Co): 39.0-42.0%
- Molybdenum (Mo): 15.0-17.0%
Mechanical Properties
UNS N06600
- Tensile Strength: 550-690 MPa
- Yield Strength: 240-415 MPa
- Elongation: 30-15%
UNS N06601
- Tensile Strength: 550-690 MPa
- Yield Strength: 240-415 MPa
- Elongation: 30-15%
UNS N06625
- Tensile Strength: 830-1035 MPa
- Yield Strength: 415 MPa min
- Elongation: 30% min
UNS N06690
- Tensile Strength: 827 MPa
- Yield Strength: 414 MPa
- Elongation: 25%
UNS N06693
- Tensile Strength: 827 MPa
- Yield Strength: 414 MPa
- Elongation: 25%
UNS N0625
- Tensile Strength: 725 MPa
- Yield Strength: 310 MPa
- Elongation: 35%
UNS N0645
- Tensile Strength: 785 MPa
- Yield Strength: 415 MPa
- Elongation: 20%
ASTM B167 Significance in the Aerospace Industry
High-Temperature Resistance: The materials specified in ASTM B167 exhibit excellent resistance to high temperatures, making them ideal for use in aerospace applications where exposure to extreme heat is common.
Corrosion Resistance: Aerospace components often operate in harsh environments where corrosion can occur. ASTM B167 materials offer superior corrosion resistance, ensuring the longevity and reliability of critical aircraft components.
Mechanical Properties: The seamless pipes and tubes manufactured in accordance with ASTM B167 demonstrate exceptional mechanical properties, including high strength and ductility, essential for withstanding the dynamic forces experienced during flight.
Regulatory Compliance: Compliance with ASTM standards is essential for aerospace manufacturers to meet regulatory requirements and ensure the safety and reliability of their products. ASTM B167 provides a standardized framework for material specifications, facilitating regulatory compliance in the aerospace industry.
Versatility: The wide range of alloys covered by ASTM B167 allows aerospace engineers to select materials tailored to specific application requirements, whether it’s for engine components, exhaust systems, or structural elements.
In conclusion, ASTM B167 plays a crucial role in the aerospace industry by defining the specifications for seamless pipes and tubes made from Nickel-Chromium-Iron Alloys and Nickel-Chromium-Cobalt-Molybdenum Alloy. These materials offer exceptional properties that meet the stringent demands of aerospace applications, ensuring safety, reliability, and performance in aircraft systems.
