Duplex 2205 Seamless Tube , ASTM A789 UNS S31803 Duplex Steel Tube
Brand Name:YUHONG
Certification:ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number:ASTM A789 UNS S31803 Seamless Duplex Steel Tube
Minimum Order Quantity:500kgs
Delivery Time:7 DAYS
Payment Terms:L/C, T/T
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ASTM A789 Duplex 2205 / UNS S31803 Seamless Duplex Stainless Steel Tube
Duplex S31803 is also known as UNS S32205. This type of tubing is characterized by its dual-phase microstructure, combining features of both austenitic and ferritic stainless steels. Despite its high-performance characteristics, Duplex S31803 tubing is relatively cost-effective compared to other high-alloy steels. Its durability and longevity contribute to lower maintenance costs and longer service life, providing a cost-efficient solution for many industrial applications.
ASTM A789 UNS S31803 Duplex Steel Tube Equivalent Grade
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
|---|---|---|---|---|---|---|---|
| BS | En | No | Name | ||||
| 2205 | S31803 / S32205 | 318S13 | - | 1.4462 | X2CrNiMoN22-5-3 | 2377 | SUS 329J3L |
ASTM A789 UNS S31803 Duplex Steel Tube Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 2205 (UNS S31803) | Min Max | - 0.030 | - 2.00 | - 1.00 | - 0.030 | - 0.020 | 21.0 - 23.0 | 2.5 - 3.5 | 4.5 - 6.5 | 0.08 - 0.20 |
| 2205 (UNS S32205) | Min Max | - 0.030 | - 2.00 | - 1.00 | - 0.030 | - 0.020 | 22.0 - 23.0 | 3.0 - 3.5 | 4.5 - 6.5 | 0.14 - 0.20 |
ASTM A789 UNS S31803 Duplex Steel Tube Physical Properties
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Co-eff of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C ( J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| UNS S32205 / 2205 | 782 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
ASTM A789 UNS S31803 Duplex Steel Tube Mechanical Composition
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| UNS S32205 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
Here are some of the key advantages of using duplex S31803 tubes:
Corrosion Resistance: Duplex S31803 tubes exhibit excellent resistance to corrosion in various environments, including chloride-containing and acidic environments, making them suitable for harsh industrial applications.
High Strength: These tubes have higher strength compared to austenitic stainless steels, allowing for thinner wall thicknesses and lighter weight designs while maintaining structural integrity.
Good Toughness: Duplex S31803 tubes offer good toughness, making them suitable for applications where impact resistance is important.
Good Weldability: They have good weldability characteristics, which simplifies the fabrication process and reduces the risk of welding defects.
High Temperature Resistance: Duplex S31803 tubes can withstand high temperatures, making them suitable for applications in elevated temperature environments.
Cost-Effective: Despite their superior properties, duplex S31803 tubes are relatively cost-effective compared to other high-performance materials.
Low Thermal Expansion: These tubes have low thermal expansion coefficients, which helps reduce the risk of thermal distortion in applications involving temperature fluctuations.
Erosion Resistance: Duplex S31803 tubes offer good resistance to erosion and erosion-corrosion, making them suitable for applications where abrasive substances are present.
Applications
Oil and Gas Industry
Chemical Processing
Desalination Plants
Power Generation
Heat Exchangers
Pulp and Paper Industry
Automotive Industry
Construction
Duplex 2205 Seamless Tube , ASTM A789 UNS S31803 Duplex Steel Tube
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