ASTM B407-22
This material specification pertains to seamless pipes and tubes made from nickel-iron-chromium alloy. The composition of the alloy contains these three elements in varying amounts to create a material with excellent corrosion resistance and high-temperature strength properties. The seamless production process ensures that the pipes and tubes have a uniform surface finish and consistent dimensions throughout their length. This standard sets out the requirements that pipes and tubes must meet in terms of chemical composition, mechanical properties, and dimensions. By complying with this standard, manufacturers can ensure that their products meet the needs of various industries that require this type of alloy for their applications.
The ASTM B407 specification outlines the standard requirements for a nickel-iron-chromium alloy, specifically encompassing several grades such as ASTM B407 UNS N08810, UNS N08800, UNS N08801, UNS N08811, UNS N08890, and UNS N06811. These alloys are available in the form of seamless pipes and tubes, which can be either cold-worked or hot-finished and then annealed. It is important to note that the content generated by using a language model will be distinct from the original text, providing a fresh perspective.
Operating Temperature
The seamless pipe and tube specified in ASTM B407 is designed for various alloys including UNS N08800, UNS N08801, UNS N08810, and UNS N08811. These alloys can undergo cold working and hot finishing, followed by annealing for optimal properties. Typically, the ASME SB 407 UNS N08800 alloy is suitable for service temperatures up to 1100 °F (593 °C). However, for higher service temperatures exceeding 1100 °F (593 °C) and when resistance to creep and rupture is necessary, the ASTM B407 800H and ASTM B407 800HT alloys are utilized. The annealing process is employed to control the grain size, ensuring enhanced properties within this temperature range. Thus, the specification serves as a guideline for selecting the appropriate alloy for specific temperature requirements.
Mechanical Properties of Pipe and Tube
| Alloy | Condition (Temper) | Tensile Strength min psi (MPa) |
Yield Strength (0.2 % offset) min psi (MPa) | Elongation in 2 in. or 50mm (or 4D), min,% |
| UNS N08120 | hot-finished annealed or cold-worked annealed | 90 000 (621) | 40 000 (276) | 30 |
| UNS N08800 | cold-worked annealed | 75 000 (520) | 30 000 (205) | 30 |
| UNS N08800 | hot-finished annealed or hot-finished | 65 000 (450) | 25 000 (170) | 30 |
| UNS N08810 and UNS N08811 | hot-finished annealed or cold-worked annealed | 65 000 (450) | 25 000 (170) | 30 |
| UNS N08801 | hot-finished annealed or cold-worked annealed | 65 000 (450) | 25 000 (170) | 30 |
| UNS N08890 | hot-finished annealed or cold-worked annealed | 75 000 (520) | 30 000 (205) | 35 |
| UNS N06811 | hot-finished annealed or cold-worked annealed | 85 000 (585) | 35 000 (240) | 30 |
The allowable deviations in the outside and inside diameter and the wall thickness are essential considerations when manufacturing various products. These specifications are crucial to ensure that the product will meet the precise requirements and perform accurately.
The permissible variations in the outside diameter, inside diameter, and wall thickness are indispensable factors in the manufacturing process. These guidelines ensure that the final product meets the necessary specifications and performs correctly.
| Specified Outside Diameter or Calculated Nominal Outside Diameter (When Ordered to Inside Diameter and Average Wall) |
Permissible Variations | |||