ASTM A928 is the standard specification for ferritic/austenitic (duplex) stainless steel pipes for electric fusion welding (EFW) with the addition of filler metal. UNS S31803 refers to a specific grade in this standard, known as duplex 2205 stainless steel pipe.
GNEE, as a professional exporter of duplex stainless steel pipes, supplies S31803 duplex stainless steel pipes with high strength, good toughness, excellent corrosion resistance, especially resistance to chloride stress corrosion. It has good oxidation resistance at high temperatures, but is prone to embrittlement when exposed to 370-540°C or above 300°C for a long time. It has excellent welding performance and can adapt to different welding methods and processes.
Products Data
Chemical Composition of Duplex Steel S31803 EFW Pipe
| 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 |
Mechanical Properties of S31803 Duplex Steel ASTM A928 EFW Pipe
| Grades | Density (g/cm 3) | Density (lb/in 3) | Melting Point (°C) | Melting Point (°F) |
| S31803 | 7.805 | 0.285 | 1420 – 1465 | 2588 – 2669 |
S31803 Duplex Steel EFW Pipe Specifications
| S31803 EFW Pipes Specifications | ASTM A928 / ASME SA928 |
|---|---|
| Dimensional specification | ANSI/ASME B36.19M, ANSI/ASME B36.10M |
| ASTM A928 S31803 EFW Pipe Size | 6" NB - 48" NB |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Duplex Steel S31803 EFW Pipes Manufacturing Shapes | Hydraulic, Round, Square, Hex, Honed |
| Delivery Condition | Annealed and Pickled, Polished, Coiled, Cold Drawn |
Products display
ASTM A928 UNS S31803 welded pipes
Why Choose GNEE
GNEE has ISO9001-2000 quality management system and ISO14001 environmental protection system. At the same time, it actively develops diversification and has formed a product line mainly based on carbon steel and stainless steel pipes, covering pipes, profiles, plates and other products. It is exported to more than 60 countries and regions including Russia, Canada, India, Brazil, Southeast Asia, etc.
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