Silver Tubes is one of the prominent exporters of Duplex Stainless Steel UNS S32205 Tubes / Stainless Steel UNS S31803 Seamless Tubes, which resists chloride environments and sulphide stress corrosion. UNS S32205 Seamless Tubes is roughly double the strength of standard austenitic stainless steels. UNS S32205 Welded Tubes recommend a maximum hot forming temperature between 2010 Degree F and 2100 Degree F (1100 Degree C to 1150 Degree C). If the shape of the work piece is not compact in UNS S32205 EFW Tubes, the edges may be significantly cooler than the bulk, and there is a risk of cracking in the cooler regions. Duplex Steel UNS S32205 ERW Tubes are somewhat more difficult to machine than the 300 series austenitic stainless steels. On the other hand, higher cutting forces in UNS S31803 Seamless Tubes are required, and more rapid tool wear is typical.
Duplex SS UNS S31803 Welded Tubes gives better-guaranteed corrosion resistance and has excellent general corrosion resistance. UNS S31803 EFW Tubes is superior to Stainless Steel 316 in most environments that have shown good formability in various fabrications. However, stainless Steel UNS S31803 ERW Tubes is not usually appropriate for use at temp beyond 300 Degree C. It agonizes from precipitation neither of hard microelements nor below -50 Degree C because of its ductile-to-brittle-transition. Duplex 2205 Tubes is two-phase, ferritic, austenitic 22% chromium, 3% molybdenum, 5-6 % nickel alloyed stainless steel.
Silver Tubes is a trusted manufacturer, supplier, and exporter of Duplex Steel UNS S32205 Tubes and Duplex Steel UNS S31803 Tubes, serving customers across diverse industries worldwide. Our tubes are manufactured using premium-quality raw materials and comply with international standards to ensure excellent strength, corrosion resistance, and durability. We maintain a comprehensive inventory of Duplex Steel S32205 Tubes and Duplex Steel S31803 Tubes in various sizes, thicknesses, and specifications to meet urgent project requirements. With strict quality control procedures, competitive pricing, timely delivery, and complete material traceability, Silver Tubes delivers reliable tubing solutions for demanding applications in oil & gas, chemical processing, marine, power generation, and offshore industries.
| Specifications | ASTM A789 / ASME SA789 |
| 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 Tubes Sizes | 1/2" NB - 8" NB |
| Welded Tubes 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 |
| Density lbm/in3 | Electrical Resistivity mW•in | tdermal Conductivity (BTU/hr•ft•°F) | Heat Capacity BTU/lbm•°F | Electrical Resistivity (in x 10-6) | |
| at 68°F | 0.278 | 27.6 | 8.7 | 0.112 | 33.5 |
| at 212°F | 26.1 | 9.2 | 0.119 | 35.4 | |
| at 392°F | 25.4 | 9.8 | 0.127 | 37.4 | |
| at 572°F | 24.9 | 10.4 | 0.134 | 39.4 |
| Dimensions | Wall | Weight per | Dimensions | Wall | Weight per | |
|---|---|---|---|---|---|---|
| (mm) | (mm) | metre (kg) | (mm) | (mm) | metre (kg) | |
| 12.7 x 12.7 | 1.20 | 0.44 | 40 x40 | 1.20 | 1.49 | |
| 12.7 x 12.7 | 1.50 | 0.55 | 40 x40 | 1.50 | 1.85 | |
| 15 x 15 | 1.20 | 0.53 | 40 x40 | 2.00 | 2.45 | |
| 15 x 15 | 1.50 | 0.65 | 40 x40 | 3.00 | 3.75 | |
| 20 x 20 | 1.20 | 0.71 | 50 x50 | 1.50 | 2.32 | |
| 20 x 20 | 1.50 | 0.88 | 50 x50 | 2.00 | 3.08 | |
| 20 x 20 | 2.00 | 1.19 | 50 x50 | 3.00 | 4.65 | |
| 25 x 25 | 1.20 | 0.92 | 60 x60 | 2.00 | 3.71 | |
| 25 x 25 | 1.50 | 1.14 | 60 x60 | 3.00 | 5.49 | |
| 25 x 25 | 2.00 | 1.49 | 70 x70 | 3.00 | 6.53 | |
| 25 x 25 | 3.00 | 2.20 | 80 x80 | 2.00 | 4.98 | |
| 30 x 30 | 1.20 | 1.10 | 80 x80 | 3.00 | 7.53 | |
| 30 x 30 | 1.50 | 1.37 | 100 x 100 | 2.00 | 6.40 | |
| 30 x 30 | 2.00 | 1.84 | 100 x 100 | 3.00 | 9.53 | |
| 30 x 30 | 3.00 | 2.72 | ||||
| O.D. Inches | Wall Thickness Inches | O.D. +/- Inches |
|---|---|---|
| 1/2" to 1" incl. | .025 to .065 | .005 |
| Over .065 to .134 | .010 | |
| 1 to 1-1/2" incl. | .025 to .065 | .008 |
| Over .065 to .134 | .010 | |
| 1-1/2" to 2" incl. | .025 to .049 | .010 |
| Over .049 to .083 | .011 | |
| Over .083 to .148 | .012 | |
| 2" to 2-1/2" incl. | .032 to .065 | .012 |
| Over .065 to .109 | .013 | |
| Over .109 to .165 | .014 | |
| 2-1/2" to 3-1/2" incl. | .032 to .165 | .014 |
| Over .165 to .220 | .020 | |
| 3-1/2" to 5" incl. | .083 to .165 | .020 |
| Over .165 to .220 | .025 |
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Both grades are similar, but UNS S32205 is the enhanced version of UNS S31803 with tighter chemical composition controls and improved corrosion resistance.
These tubes are widely used in offshore platforms, chemical processing plants, heat exchangers, pressure vessels, and marine applications.
Yes, Duplex Steel S31803 Tubes offer excellent resistance to chloride-induced stress corrosion cracking, pitting, and crevice corrosion.
They are available in a wide range of diameters, wall thicknesses, and lengths, including customized dimensions as per project requirements.
Yes, their high yield strength and excellent toughness make them suitable for high-pressure and high-temperature environments.
Yes, Duplex Steel S32205 Tubes provide nearly double the yield strength of conventional 304 and 316 stainless steel grades.
Yes, material test certificates and quality inspection reports are generally supplied to ensure product compliance and traceability.
These tubes are commonly used in oil & gas, petrochemical, desalination, marine, pulp & paper, and power generation industries.
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