Duplex 2205 (UNS S31803 / S32205) Precision Tubing
22% Chromium, 5% Nickel, 3% Molybdenum dual-phase tubing engineered for high pressure, offshore, and heat exchanger deployment.
ASTM A789 / ASME SA789 UNS S32205 Duplex Tubing
Starlight Tubes is a leading manufacturer of Duplex 2205 (UNS S32205 / EN 1.4462) precision seamless and welded tubes. Featuring an optimized 50% austenitic and 50% ferritic microstructure, Duplex 2205 provides high thermal conductivity, low thermal expansion, and exceptional resistance to stress corrosion cracking in chloride and sour environments.
Our Duplex 2205 tubes are available in straight lengths and U-bend bundles for shell and tube heat exchangers, hydraulic control lines, and subsea instrumentation. Every batch undergoes 100% eddy current testing, hydro testing up to 500 bar, and microstructural phase balance analysis.
Technical Specifications
ASTM / ASME CompliantTechnical Specifications — Duplex 2205 (UNS S32205)
Certified chemical limits and mechanical tensile properties for ASTM A789 UNS S32205
| Grade | C (max) | Mn (max) | Si (max) | P (max) | S (max) | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| 2205 (S32205) | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 22.0-23.0 | 4.5-6.5 | 3.0-3.5 | 0.14-0.20 |
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Direct Mill Pricing for Duplex 2205 Tubing
Starlight Tubes manufactures high-precision Duplex 2205 tubes with certified phase balance analysis, NDT testing, and worldwide export crating.
Frequently Asked Questions on Duplex 2205 Seamless & Welded Tubing
Key engineering, tolerance, and international compliance answers from our metallurgical quality desk.
Duplex 2205 tubing is manufactured to ASTM A789 (general service & heat exchanger) and ASME SA789 specifications with strict phase balance verification (40-60% ferrite/austenite).
Request Project Quotation for Duplex 2205 Seamless & Welded Tubing
Submit your required sizes, wall thicknesses, material grades, and total tonnage. Our technical sales engineers respond with complete mill pricing and lead times within 24 hours.