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Duplex Steel Pipe & Tube 双相不锈钢管
Duplex stainless steel pipe generally refers to a steel composed of 50% Ferritic and 50% Austenitic phase structure. This composition gives them a better strength than either Ferritic or Austenitic steels. Duplex stainless steel has excellent pitting corrosion resistance and is also a nickel-saving stainless steel.
GUTE supplys the ASME SA789 and ASME SA790 Duplex Stainless Steel Pipe and tube materials for the Oil and Gas, Refinery, Petrochemical and Power Industries as S31803 Duplex steel Pipe, 2205 Duplex steel Pipe, S32750 Super Duplex steel Pipe, S32760 Super Duplex steel Pipe.
A790 S32750 Super Duplex Pipe | A789 S31803 Tube | A790 UNS S31803 Pipe |
Seamless Duplex SS Tube | Super Duplex S32205 Pipe | Super Dupex S32760 Pipe |
Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Ni | Cr | Mo | N | Cu |
S31803 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | - |
S32205 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | - |
S32750 | 0.03 | 1.20 | 0.035 | 0.02 | 0.80 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
S32760 | 0.05 | 1.00 | 0.03 | 0.01 | 1.00 | 6.0-8.0 | 24.0-26.0 | 3.0-4.0 | 0.20-0.30 | 0.50–1.00 |
Mechanical properties | Tensile,min,ksi[MPa] | Yield,min,ksi[MPa] | Elongation,%(min) | Hardness,HB(max) |
S31803 | 90 [620] | 65 [450] | 25 | 290 |
S32205 | 95 [655] | 65 [450] | 25 | 290 |
S32750 | 116 [800] | 80 [550] | 15 | 300 |
S32760 | 109 [750] | 80 [550] | 25 | 300 |
Duplex Stainless steel pipes are manufactured according to the ASME B36.19 standard.
DUPLEX PIPE:S31803 Pipe, S32205 Pipe
SUPER DUPLEX PIPES: S32750 Pipe, S32760 Pipe
Duplex pipes and Super Duplex pipes match the following fittings materials: ASTM A815 (butt weld fittings) and ASTM A182 F51 / F53 / F55 / F60 (flanges / forged socket weld and threaded fittings).
Test:
Tension Test, Flattening Test, Hardness Test, or Bend Test; Hydrostatic Test or nondestructive electric test.
Applications:
Chemical processing, transport and storage, Oil and gas exploration and processing equipment, Effluent scrubbing systems, Food processing equipment, Cargo tanks for ships and trucks, Biofuels plants
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