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S31803/2205 Duplex Steel Chemical Tube,ASTM A789 Tube
SSDST25
Price: From $5500-8000USD/TON
Material: S32205, S31803, 1.4462;
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1 / 4 Inch ASTM A789 S31803 Stainless Steel Duplex Steel Tube NDT For Chemical Industry
| Grade | Standard | Outside Diameter | 3.18mm-38mm |
| S31803/2205 S32750/2507 S32760 | ASTM-A789 ...... | Wall Thickness | 0.5mm-3mm |
| Length | ≤30m | ||
| Surface | Bright Annealed/ Polished/ Annealed Pickled | ||
| Inspection | Appearance/ Dimensional test, PMI; NDT: UT/ ET/ HT; Physical & chemical test | ||
| Certificates | ISO/PED/AD2000/TS | ||
| Package | End protection/ Woven bags/ Wooden cases |
Quality Control of MTSCO Duplex Tube:
| UNS Designation | C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
| max | max | max | max | max | ||||||
| S31803 | 0.03 | 1 | 2 | 0.03 | 0.02 | 21.0 - 23.0 | 4.5 - 6.5 | 2.5 - 3.5 | 0.08 - 0.20 | - |
| 2205 | ||||||||||
| S32205 | 0.03 | 1 | 2 | 0.03 | 0.02 | 22.0 - 23.0 | 4.5 - 6.5 | 3.0 - 3.5 | 0.14 - 0.20 | - |
| S32750 | 0.03 | 0.8 | 1.2 | 0.035 | 0.02 | 24.0 - 26.0 | 6.0 - 8.0 | 3.0 - 5.0 | 0.24 - 0.32 | 0.5 max |
| 2507 | ||||||||||
| S32760 | 0.05 | 1 | 1 | 0.03 | 0.01 | 24.0 - 26.0 | 6.0 - 8.0 | 3.0 - 4.0 | 0.20 - 0.30 | 0.50 -1.00 |
Features of ASTM A789 Tube:
Annealed Pickled VS Polished Surface:
ASTM A789 Duplex Steel Seamless and Welded Tubing
ASTM A789 is a standard specification developed by the American Society for Testing and Materials (ASTM) that covers general requirements for seamless and welded ferritic/austenitic stainless steel tubes. These tubes are categorized according to different steel grades, such as S31803, S32205, etc., each of which has a different chemical composition and mechanical properties.
ASTM A789 standard seamless and welded duplex steel pipe has several outstanding properties that make it stand out in many piping applications:
1. Duplex structure: Duplex steel pipe has two different crystal structures, austenite and ferrite, giving the pipe excellent strength and corrosion resistance.
2. Good corrosion resistance: These pipes perform well against corrosive media such as brines, chlorides and acids. 3.
3. High Strength: Duplex pipes have excellent tensile strength and are capable of withstanding high pressures, making them suitable for use in high pressure piping systems.
4. Wide Temperature Range: ASTM A789 standard pipe can be operated over a wide range of temperatures, including very low and high temperature conditions.
5. Excellent weldability: These pipes are easy to weld and can meet the needs of a variety of projects
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