ASTM B165 UNS N04400 Cold Finished Seamless Pipe
Learn about ASTM B165 UNS N04400 cold-finished seamless pipe
ASTM B165 UNS N04400 cold-finished seamless pipe is a nickel-copper alloy (Monel 400) known for its high strength, excellent corrosion resistance in a variety of harsh environments, and good mechanical properties at subzero and elevated temperatures. The "B165" standard specifies requirements for cold-finished seamless pipe, which must undergo nondestructive testing and meet specified mechanical properties, including tensile testing and hardness. This pipe is suitable for demanding applications such as chemical processing, marine environments, and oil and gas recovery.
What is the ASTM standard for Monel 400?
Monel 400 has multiple ASTM standards depending on the product form, such as ASTM B127 for plate, sheet, and strip, ASTM B163 and B165 for seamless and welded pipe, and ASTM B164 for bar. Other standards include ASTM B564 for flanges and AMS (Aerospace Material Specification) for specific applications, such as AMS 4574.
Overview of of MONEL 400 Pipe
Monel 400 is a Nickel-Copper alloy, resistant to sea water and steam at high temperatures as well as to salt and caustic solutions.Monel 400 is a nickel-copper alloy with excellent corrosion resistance in a wide variety of media. Monel 400 is characterized by good general corrosion resistance, good weldability and moderate to high strength. The alloy has been used in a variety of applications. It has excellent resistance to rapidly flowing brackish water or seawater. It is particularly resistant to hydrochloric and hydrofluoric acids when they are de-aerated. The alloy is slightly magnetic at room temperature. Monel 400 is widely used in the chemical, oil and marine industries.
Characteristics of UNS N04400 Tube
Corrosion resistance in an extensive range of marine and chemical environments. From pure water to nonoxidizing mineral acids, salts and alkalis.
This alloy is more resistant to nickel under reducing conditions and more resistant than copper under oxidizing conditions, it does show however better resistance to reducing media than oxidizing.
Good mechanical properties from subzero temperatures up to about 480C.
Good resistance to sulfuric and hydrofluoric acids. Aeration however will result in increased corrosion rates. May be used to handle hydrochloric acid, but the presence of oxidizing salts will greatly accelerate corrosive attack.
Resistance to neutral, alkaline and acid salts is shown, but poor resistance is found with oxidizing acid salts such as ferric chloride.
Excellent resistance to chloride ion stress corrosion cracking.
Chemical Composition of MONEL 400 Pipe
| Ni | C | Mn | S | Si | Cu | Fe | |
| Max | 0.3 | 2.00 | 0.024 | 0.5 | 34.0 | 2.50 | |
| Min | 63.0 | 28.0 |
Mechanical Properties of UNS N04400 Tube
|
Condition & Size |
Tensile Strength, min. ksi [MPa] |
Yield Strength, min. ksi [MPa] |
Elongation, min. % |
|---|---|---|---|
| *A | 70 [480] | 28 [195] | 35 |
| *B | 70 [480] | 25 [170] | 35 |
| *C | 85 [585] | 55 [380] | 15 |
Key Aspects of ASTM B165
Standard Specification: ASTM International states that ASTM B165 is the standard covering the requirements for cold-finished seamless tubing made of nickel-copper alloy (UNS N04400).
Testing Requirements: The standard mandates various tests to ensure quality and integrity, including:
Hydrostatic or nondestructive electrical testing: used to detect defects.
Tensile testing: used to verify mechanical properties such as tensile strength and yield strength.
Hardness testing: used to confirm Rockwell hardness.
Surface Finish and Condition: According to Metal Pipe magazine, pipe can be finished in the annealed or stress-relieved condition to achieve the desired surface quality and internal stress relief.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
