Duplex 2205 stainless steel seamless pipe (UNS S31803/S32205) offers high strength, corrosion resistance, and durability for oil, gas, marine, and chemical industries.
Duplex 2205 is also called UNS S31803 / S32205 or EN 1.4462. It is a dual-phase stainless steel. It has ferrite and austenite in balance. This structure gives high strength. It also improves corrosion resistance. Duplex 2205 is stronger than 304 and 316.
| Standard | Description |
| ASTM A790 / ASME SA790 | Seamless & welded duplex stainless steel pipe |
| ASTM A789 / ASME SA789 | Seamless & welded duplex stainless steel tube |
| UNS | S31803 / S32205 |
| EN Number | 1.4462 |
| Size Range | ½” to 24” (custom on request) |
| Wall Thickness | SCH 10 to SCH 160 |
| Length | Random, fixed, or custom cut |
| Delivery Condition | Annealed & pickled |
| Surface Finish | Bright annealed, pickled, polished |
| NDT & Testing | Eddy current, hydrostatic, ultrasonic, PMI |
A: Duplex 2205 has nearly double the yield strength of 316, better resistance to chloride stress corrosion cracking, and longer service life in aggressive environments.
A: Pipes undergo non-destructive testing such as eddy current, ultrasonic inspection, hydrostatic testing, and positive material identification (PMI) to ensure quality.
A: You can source them from professional stainless steel manufacturers and exporters such as SUNNING STEEL LIMITED, which provides a wide range of sizes, surface finishes, and custom processing services.
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