Ferrobend is a stockist and supplier of Duplex Stainless Steel Welded Pipes to ASTM A790 UNS S31803 specification. Duplex stainless steel pipes are intended for general corrosive service with particular emphasis on resistance to stress corrosion cracking.
| Specification | Values |
|---|---|
| Forming | Hot and Cold Finished |
| Sizes | 1/8 to 100 Inch |
| Thickness | Up to 25mm |
| Length | Up to 12 Meters |
| End Preparation | Plain / Bevelled / Threaded |
For information on duplex stainless steel welded pipes size, dimensions and weight, please refer below standard dimensional charts.
Find chemical composition, heat-treatment, mechanical properties including tensile, yield, hardness and flattening test, surface finish, and other optional requirements for duplex stainless steel ASTM A790 UNS S31803 pipes.
| Element | Composition, % |
|---|---|
| Carbon | 0.03 max |
| Manganese | 2.00 max |
| Phosphorus | 0.03 max |
| Sulfur | 0.02 max |
| Silicon | 1.00 max |
| Nickel | 4.50 - 6.50 |
| Chromium | 21.00 - 21.30 |
| Molybdenum | 2.50 - 3.50 |
| Nitrogen | 0.08 - 0.20 |
| Process | Value |
|---|---|
| Annealing Temperature °F [°C] | 1870 - 2010 [1020 - 1100] |
| Quenching | Rapid Cooling in Air or Water |
| Property | Value | |
|---|---|---|
| Tensile Strength, min, ksi, [MPa] | 90 [ 620] | |
| Yield Strength, min, ksi [MPa] | 65 [450] | |
| Elongation in 2 in. or 50mm, min, % | 25 | |
| Hardness, max | HBW | HRC |
| 290 | 30 | |
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