ASTM B729 N08020 Nickel Alloy High-Pressure and High-Temperature Pipe
ASTM B729 N08020 Nickel Alloy High-Pressure and High-Temperature Pipe
ASTM B729 N08020 is a specification for seamless nickel alloy tubing designed for high-pressure, high-temperature applications. It offers excellent corrosion resistance, particularly in acidic and chloride environments. Key properties include high mechanical strength at elevated temperatures, good machinability, and resistance to pitting and stress corrosion cracking. Commonly referred to as Alloy 20 or Carpenter 20, it is widely used in the chemical, pharmaceutical, and food processing industries.
What is N08020 material?
UNS N08020 refers to Alloy 20, a corrosion-resistant austenitic nickel-iron-chromium alloy. It is commonly used in industries such as chemical processing, pharmaceuticals, and food processing due to its excellent resistance to strong acids such as sulfuric acid, as well as pitting, crevice corrosion, and chloride stress corrosion cracking. The alloy is also enhanced with the addition of copper, molybdenum, and niobium for strength.
ASTM B729 NO8020 ALLOY20 Bright Finish Nickel Alloy Pipe
ASTM B729 NO8020 is a specification for NO8020 nickel alloy seamless pipe. This alloy is a high-performance material with excellent corrosion resistance, high strength, and good thermal stability. Pipe produced to this specification is commonly used in industries such as chemical processing, oil and gas, and offshore engineering.
ASTM B729 specifies the dimensions, mechanical properties, and testing requirements for NO8020 nickel alloy pipe. This standard ensures that the pipe meets the quality standards required for its intended use. Manufacturers and suppliers of these pipes must adhere to the requirements of this specification to ensure product reliability and performance.
ASME SB729 Alloy 20 Pipe Mechanical Properties
| Density | Melting Range | Yield Stress (0.2%Offset) | Tensile Stress | Elongation |
| 8.1 g/cm3 | 1443 °C (2430 °F) | Psi - 35000 , MPa - 241 | Psi - 80000 , MPa - 551 | 30 % |
Alloy WERKSTOFF NR. 2.4660 Pipe Chemical Composition
| Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
| 32 - 38 | 0.02 max | 2 - 3 | 1 - 2 | 0.7 max | Bal | 3 - 4 | 0.005 max | 0.02 max | 19 - 21 |
Specifications and Testing
Standard: ASTM B729 covers seamless cold-finished or hot-finished tubing.
Composition: Nickel-based alloy (UNS N08020) containing significant amounts of iron, chromium, copper, and molybdenum.
Quality Assurance: Pipe undergoes rigorous testing to ensure quality, including hydrostatic, ultrasonic, and eddy current testing. Other testing may include mechanical testing, positive material identification (PMI), chemical analysis, and corrosion testing.
Condition: Pipe is supplied in various conditions, such as solution annealed or stabilized annealed.
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.
