ASTM A790 S31803 seamless pipe

ASTM A790 UNS S31803 duplex seamless pipes are made of a special duplex steel has a ferritic and austenitic structure, and are used in various industries due to their resistance to corrosion, high strength, and good weldability.

HT PIPE Supply ASTM A790 Duplex Seamless Pipes in  Grades UNS S32205, UNS S31803, UNS S32750, UNS S32760, SAF 2205, SAF 2507 etc, UNS S31803 seamless Pipe, duplex 2205 seamless pipe, 1.4462 seamless pipe, 2205 seamless pipe manufacturer, duplex 2205 pipe suppliers, duplex 2205 tube, duplex 2205 seamless tube exporter in China.

The manufacturing process of ASTM A790 UNS S31803 duplex seamless pipes involves several stages, including melting the raw materials, casting the billets, hot rolling the billets into seamless pipes, and cold drawing and annealing the pipes to improve their mechanical properties. The standard regulates the chemical composition, dimensions, and testing requirements for the pipes.

The chemical composition of ASTM A790 UNS S31803 duplex seamless pipes:

• 
  

  Chromium (Cr): 21-23%

  
  

• 
  

  Nickel (Ni): 4.5-6.5%

  
  

• 
  

  Molybdenum (Mo): 2.5-3.5%

  
  

• 
  

  Nitrogen (N): 0.08-0.2%

  
  

• 
  

  Carbon (C): 0.03% max

  
  

• 
  

  Manganese (Mn): 2% max

  
  

• 
  

  Silicon (Si): 1% max

  
  

• 
  

  Phosphorus (P): 0.03% max

  
  

• 
  

  Sulfur (S): 0.02% max

  
  

Duplex UNS S31803 Grade Specification

The ASTM A790 duplex seamless pipes offer several properties that make them ideal for various applications:

- Excellent corrosion resistance - The duplex steel has a high resistance to corrosion in various environments, including seawater, acids, and chlorides.

- High strength - The duplex steel has a higher strength than many other types of stainless steel, making it suitable for high-pressure and high-temperature applications.

- Good weldability - The duplex steel has good weldability, which means it can be easily welded and fabricated.

- Good ductility and toughness - The duplex steel has good ductility and toughness, which makes it suitable for cold working and impact loading applications.

- Good heat resistance - The duplex steel can withstand high temperatures without losing its properties or deforming.

ASTM A790 UNS S31803 duplex stainless steel seamless pipes are used in various industries due to their excellent properties:

- Oil and gas industry - The duplex seamless pipes are used for transporting oil and gas under high pressure and corrosive environments.

- Chemical and petrochemical industry - The pipes are used for transporting corrosive chemicals and acids.

- Food and beverage industry - The duplex seamless pipes are used for transporting food and beverage products.

- Desalination plants - The pipes are used for transporting seawater in desalination plants.

- Construction industry - The duplex seamless pipes are used for building bridges, tunnels, and other infrastructure projects.