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A789 UNS S31803 and UNS S32205 Seamless Tubing

A789 UNS S31803 and UNS S32205 are two grades of duplex stainless steel that are widely used in various industrial applications. These Duplex S31803 Seamless Pipes are known for their excellent corrosion resistance, high strength, and good weldability. A789 is a specification that covers seamless and welded tubes made from duplex stainless steel.

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Duplex S31803 Seamless Pipe, SAF 2205 Pipe, Duplex 2205 Tubing, Werkstoff Nr. 1.4462 Pipe,  ASTM A789 Duplex Stainless Steel Seamless Pipe, ASTM A789 UNS S32205 Duplex Pipe, Duplex Stainless Steel S31803 Pipe.

 

A789 UNS S31803 and UNS S32205 are two grades of duplex stainless steel that are widely used in various industrial applications. These Duplex S31803 Seamless Pipes are known for their excellent corrosion resistance, high strength, and good weldability. A789 is a specification that covers seamless and welded tubes made from duplex stainless steel.

 

UNS S31803 is a duplex stainless steel that contains 22% chromium, 3% molybdenum, and 5-6% nickel. SAF 2205 Pipe has a dual-phase microstructure consisting of both ferritic and austenitic phases. This makes Duplex 2205 SMLS Tubing suitable for use in highly corrosive environments that may cause pitting and crevice corrosion. UNS S32205 is a higher-end version of UNS S31803, which has improved chemical and mechanical properties.

 

The A789 specification covers both seamless and welded tubes made from duplex stainless steel. Werkstoff Nr. 1.4462 Seamless Tubes are preferred in many applications due to their excellent dimensional accuracy, surface finish, and mechanical properties. A789 UNS S31803 and UNS S32205 seamless tubing is widely used in chemical processing, oil and gas, petrochemicals, and marine applications.

Duplex 2205 Tubing

The manufacturing process of A789 UNS S31803 and UNS S32205 Seamless Tubing involves using premium quality raw materials and advanced techniques. The ASTM A789 Duplex Stainless Steel Seamless Pipe raw material is carefully selected and tested for its quality and composition. The ASTM A789 UNS S32205 Duplex Pipes are then cold drawn using high-quality dies and tools to ensure uniform dimensions and a smooth surface finish.

 

The A789 specification requires stringent testing of the tubes to ensure their quality and performance. The tests include hydrostatic testing, eddy current testing, and ultrasonic testing. These tests are conducted to check the UNS S32205 Duplex Pipe mechanical properties, Duplex Stainless Steel S31803 Pipe chemical composition, and Werkstoff Nr. 1.4462 Pipe microstructure of the tubes.

 

A789 UNS S31803 and UNS S32205 seamless tubing is available in various sizes, grades, and specifications. UNS S31803 Pipes are supplied in annealed and pickled condition to ensure excellent corrosion resistance. The UNS S32205 Seamless Tubes are also available in custom lengths and shapes as per the requirements of the end-users.

 

Duplex 2205 Seamless Tube Chemical Composition

C N P Si Mn Mo Fe Cr S Ni
1.0 0.03 0.02 2.0 3.0 – 3.5 22.0 – 23.0 0.03 4.5 – 6.5 0.14 – 0.2 Bal

 

ASTM A789 UNS S31803 Tube Mechanical Properties

Pipe Density Pipe Melting Point Yield Strength (0.2%Offset) 2205 Duplex SS Pipe Tensile Strength Elongation
7.8 g/cm3 1350 °C (2460 °F) Psi – 80000 , MPa – 550 Psi – 116000 , MPa – 800 15%
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