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Silver Tubes is a well-known whole seller of Duplex Stainless Steel UNS S32205 S31803 Seamless Pipes, which has excellent resistance to pitting, crevice corrosion, and chloride stress corrosion with high strength. UNS S32205 Seamless Pipes has its benefits in higher strength, higher corrosion resistance, greater metallurgical stability, and superior properties after welding.At high temperatures, above 2000 Degree F, UNS S31803 Pipes will become increasingly ferritic and fully ferritic at temperatures just below the melting point. Duplex Steel UNS S32205 Pipes typically have 50percnet to 60 percent austenite that has formed in a ferritic matrix, as shown in the photo to the right (austenite is the lighter etched phase). When hot forming is required, Duplex Steel UNS S31803 Pipes should be heated uniformly and worked in the range of 1750 Degree – 2250 Degree F.
In the solution annealed condition from about 1925 Degree F, Duplex Steel UNS S32205 Welded Pipes has a microstructure with about 40 percent to 50 percent ferrite.There are many applications of Duplex Steel UNS S31803 Welded Pipes in which processing equipment is subject both to an aggressively corrosive environment and to cyclic loading. Whenever hot forming is done, 2205 Pipes should be followed by a full solution anneal at 1900 Degree F minimum and rapid quench to restore phase balance, toughness, and corrosion resistance. We also provide these pipes at reasonable cost to our clients.
| Specifications | ASTM A790 / ASME SA790 |
| Dimensions | ASTM, ASME and API. |
| Schedule | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Seamless Pipes Sizes | 1/2" NB - 8" NB |
| Welded Pipes Sizes | 6" NB - 24" NB |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Beveled End, Treaded |
| Outer Diameter | 6.0-630mm |
| Thickness | 0.3mm – 50 mm |
| STANDARD | UNS | WERKSTOFF NR. |
| Duplex 2205 | S31803 / S32205 | 1.4462 |
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | Fe |
| S31803 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 22.0 – 23.0 | 3.0 – 3.5 | 4.50 – 6.50 | 0.14 – 0.20 | 63.72 min |
| S32205 | 0.030 max | 2.00 max | 1.00 max | 0.030 max | 0.020 max | 21.0 – 23.0 | 2.50 - 3.50 | 4.50 – 6.50 | 0.8 – 0.20 | 63.54 min |
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| Duplex 2205 | 621 | 448 | 25 | 31 | 293 |
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