ASTM B729 N08020 Nickel Alloy High Pressure Environment Pipe
ASTM B729 N08020 is a high-pressure pipe made from Alloy 20, a nickel-iron-chromium alloy containing copper and molybdenum. It is known for its excellent resistance to a variety of corrosive media, including sulfuric acid, nitric acid, and chlorides. Its key features include strong mechanical properties, high-temperature performance, and good weldability due to the addition of niobium. It is commonly used in heat exchangers, storage tanks, and other process equipment in the chemical, petrochemical, pharmaceutical, and food processing industries.
What is B729 N08020 material?
Alloy 20 pipe (ASTM B729 N08020, DIN 17751 2.4660) is a highly corrosion-resistant alloy that exhibits excellent corrosion resistance to phosphoric acid, nitric acid, and sulfuric acid in chloride-containing media. DIN 17751 2.4660 Alloy 20 is primarily used in the chemical industry, instrumentation, and heat exchangers.
ASTM B729 N08020 is the specification for N08020 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.
ASTM B729 specifies the dimensions, mechanical properties, and testing requirements for N08020 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 |
Fabrication and Welding
Forming: Hot or cold working can be performed using conventional methods.
Welding: TIG, MIG, and submerged arc welding are commonly used, using matching filler metals such as ER32OLR or E32OLR.
Heat Treatment: For N08020 alloy, annealing between 1800°F and 1850°F (982°C and 1010°C) followed by a rapid quench is recommended.
Applications
Chemical Processing: Equipment used to handle and transport corrosive chemicals.
Petrochemical: Components for refineries and processing plants.
Pharmaceutical and Food: Equipment used to process pharmaceuticals, plastics, and food.
Other: Heat exchangers, storage tanks, and piping for various industrial applications.
Specifications and Standards
Standard: ASTM B729, covering UNS N08020 nickel alloy seamless pipe.
Designation: Also known as Alloy 20 or Carpenter 20.
Testing: Pipe undergoes hydrostatic testing, ultrasonic testing, and dimensional inspection to ensure quality.
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, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
