| Standard: | ASTM A789/ASME SA789 | Material: | UNS S31803; 1.4462 |
|---|---|---|---|
| Type Of Tube: | Straight Seamless Tube | Application: | Heat Exchanger， Bolier |
| Length: | 6m Or As Required | Delivery Condition: | Solution Annealed & Pickled |
| Packing: | Plywood Case/Woven Bag In Bundle | Mill Test Certificate: | EN10204 3.1/EN10204 3.2 |
| High Light: | duplex stainless steel pipes astm a789， uns s31803 super duplex pipe， 48′ duplex stainless steel pipes | ||
ASTM A789/ASME SA789 UNS S31803/1.4462 DUPLEX STAINLESS STEEL SEAMLESS TUBE
Overview:
The ASTM A789 UNS S31803 tubing refers to seamless and welded tubing manufactured in accordance with ASTM A789/ASTM A789M， which contains approximately 50% ferrite and 50% austenite. The stress corrosion resistance of ASTM A789 in neutral chloride solution and H2S is better than that of 304L， 316L austenitic stainless steel， and 18-5mo type duplex stainless steel. The UNS S31803 tubing is especially suitable for the temperature range of -50°F/+600°F. It may also be considered for applications beyond this temperature range， but there are some limitations， especially when applied to weld structures.
The ASTM A789/A789M UNS 31803 tubes shall be made by the seamless or welded process with no filler metal added. It shall be quenched in cool air or water rapidly to a temperature of 1800°F[980°C]-1900°F[1040°C]. For seamless tubes， as an alternative to final heat treatment in a continuous furnace or batch-type furnace， while the tube temperature is not lower than the specified minimum solution treatment temperature， tubes may be immediately quenched in water or rapidly cooled by other means.
Specification:
| Specification | ASTM A789 & Its equivalent ASME， DIN & EN Standard. |
| Grades | UNS S31803; 1.4462 |
| Type | U-bend & Straight seamless tube |
| Outer Diameter | 1/4'' to 2'' or custom size |
| Wall Thickness | BWG25;BWG22;BWG20;BWG18;BWG16;BWG14;BWG12;BWG10 |
| Length | Up to 6 meters， custom cut lengths |
| Delivery Condition | Solution Annealed & Pickled; Bright Annealed |
| Ends | Plain End， Beveled End |
| Other Testing | Product Analysis， Eddy Current Test， Hydrostatic Test， Ultrasonic Test， Flattening Test， Hardness Test， Tensile Test etc. |
| Dimension | All Pipes & Tube Is Manufactured and Inspected / Tested to the Relevant standards including ASTM and ASME |
| Packing | Plywood case/Woven bag in bundle |
Chemical Composition:
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo | N |
| UNS S31803 | 0.03 max | 2.00 max | 0.03 max | 0.02 max | 1.00 max | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.2 |
Mechanical Properties:
| Grade | Tensile Strength， min， ksi (MPa) | Yield Strength， min， ksi (MPa) | Elongation in 2 in. or 50mm， min (%) | Hardness | Solutioning Temperature， min， °F(°C) | |
| Rockwell | Brinell/Vickers | |||||
| UNS S31803 | 90(620) | 65(450) | 25 | 30HRC | 290HBW/290HV | 1870–2010 (1020–1100) |
Applications:
1.Chemical Processing， Transport and Storage
2.Oil and Gas Exploration and Offshore Rigs
3.Mil and Gas Refining
4.Marine Environments
5.Pollution Control Equipment
6.Pulp & Paper Manufacturing
7.Chemical Process Plant
