ASTM A789 UNS S32205 Duplex Steel Seamless Tube Resistant To Seawater Corrosion
ASTM A789 S32205 Duplex Steel Seamless tube Resistant To Seawater Corrosion
ASTM A789 S31803/S32205 is a specification for seamless duplex steel tube. Duplex steel is a type of stainless steel that contains both austenitic and ferritic microstructures, providing excellent strength and corrosion resistance.
Seamless Tubes are manufactured without any welding seams, which makes them more reliable and suitable for high-pressure and high-temperature applications.
These tube are commonly used in industries such as oil and gas, chemical processing, and marine engineering. They are known for their superior performance in harsh environments and are highly resistant to corrosion, pitting, and cracking.
Chemical Composition of ASTM A789 UNS S32205 Duplex Stainless Steel Seamless Tubes
| 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 |
Mechanical Composition of ASTM A789 UNS S32205 Duplex Stainless Steel Seamless Tubes
| Grade | Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness | |
| Rockwell C (HR C) | Brinell (HB) | ||||
| UNS S31803 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
Physical Properties OF ASTM A789 UNS S32205 Duplex Stainless Steel Seamless Tubes
| 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 S31803 / 2205 | 782 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
Grade Specification Comparison
| 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 |
Application Of ASTM A789 S32205 duplex steel seamless tube.
1. Oil and gas industry
2. Chemical processing industry
3. Power generation industry
4. Water treatment industry
5. Marine industry
6. Food processing industry
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