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ASTM A790

Austenitic Ferritic Stainless Steel Seamless Welded Pipe

ASTM A790 Standards And Specifications

The ASTM A790 covers duplex stainless steel for seamless and welded pipe used in seawater handling, hydrometallurgy, etc.

ASTM A790 - Seamless and Welded Pipe

ASTM A790 Pipe

ASTM A790 is a austenitic- ferritic stainless steel for welded pipe and seamless pipe. These welded pipe and seamless pipe have rectangular, square, oval forms with bright, polish and black as surface finishing.

Scope And Manufacturing

ASTM A790 specification stands for seamless and welded tube (UNS S31803, UNS S32205, UNS S32750, UNS S32760) of stainless steel. These tubes can be readily sheared and shaped by bending, drawing, pressing, and other common procedures. Some allowance should be made for its high strength and the resulting greater springbok. The heat treatment after cold working operations is usually not required. If it is necessary to perform hot working operations, these procedures should be carried out within the range of 1800-2100°F. Higher temperatures reduce workability. Heavy scaling can occur with extended heating above 2100°F. The tube should be annealed at 2100°F minimum after hot working and cooled rapidly, ideally by water quenching. This anneal is necessary to eliminate intermetallic phases possibly precipitated during hot working, and thus provide maximum corrosion resistance.

Siddhagiri Metals and Tubes offers austenitic-ferritic grades such as Duplex 2205, Super Duplex 2507, Super Duplex 4501, Duplex 2205 Welded Pipe, Super Duplex 2507 Seamless Pipe, Super Duplex 2507 Welded Pipe, which provide high resistance to stress corrosion, corrosion fatigue and high mechanical strength. Our company is an worldwide supplier of stainless steel seamless and welded pipe.


ASTM A790 specification covers ferritic-austenitic seamless pipe and welded pipe which are microstructure with a phase balance of approx 50% ferrite and the 50 % estimate. It is used as process equipment in the chemical industry.
Other Names : ASTM A790 UNS S31803, ASTM A790 UNS S32205, ASTM A790 UNS S32750, ASTM A790 UNS S32760.
Material : Duplex Stainless Steel Seamless Welded Pipe, Super Duplex Stainless Steel Seamless Welded Pipe, Super Duplex 2507 Seamless Welded Pipe, Super Duplex 4501 Seamless Welded Pipe
Brand : Siddhagiri Metals and Tubes
Manufacturer : Siddhagiri Metals and Tubes
Rating : 4.5/5 based on 65 customer reviews

Our Inventory of ASTM A790 Material

  • ASTM A790 UNS S31803
  • ASTM A790 UNS S32205
  • ASTM A790 UNS S32750
  • ASTM A790 UNS S32760