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UNS S32205/UNS S31803/EN 1.4462/ASTM A789/A790 Seamless Coiled Tubing
Shanghai Toko Tech Co., Ltd. is a professional manufacturer and supplier of high-performance special alloy pipes and components. Its 2205 (UNS S32205/S31803) seamless coiled tubing is a 22% chromium duplex (austenitic-ferritic) stainless steel that combines high strength with excellent resistance to stress corrosion cracking, pitting, and crevice corrosion.
Key Features & Advantages:
- High Strength: The duplex structure provides approximately twice the yield strength of conventional austenitic stainless steels like 304/316L, allowing for reduced wall thickness and weight savings in pressure equipment and structural components.
- Excellent Resistance to Stress Corrosion Cracking (SCC): Demonstrates superior resistance to chloride stress corrosion cracking compared to standard 300-series austenitic stainless steels.
- High Resistance to Pitting & Crevice Corrosion: The high Chromium (22%) and Molybdenum (3%) content results in a high Pitting Resistance Equivalent Number (PREN >34), making it suitable for use in aggressive chloride-containing environments.
- Good Corrosion Resistance in Acidic Environments: Offers good resistance to dilute sulfuric acids and many other corrosive media.
- Seamless & Continuous Length: The seamless structure ensures the highest integrity for critical high-pressure applications. The long coiled length eliminates weld joints, reducing potential leak points and simplifying installation in complex systems.
Typical Specifications (Customizable):
- Material Grade: UNS S32205 / UNS S31803 / EN 1.4462 / ASTM A789/A790
- Outer Diameter (O.D.): φ3mm ~ φ22 mm (Common range for coils)
- Wall Thickness (W.T.): 5mm ~ 2.0 mm (Varies with O.D.)
- Coil Length: Several hundred meters per continuous coil (exact length depends on O.D. and W.T.)
- Standard: ASTM A789, ASTM A790, etc.
Primary Applications:
This high-strength, corrosion-resistant tubing is designed for demanding applications across various industries, including:
- Oil & Gas Industry: Downhole tubing, flow lines, chemical injection lines, and pressure vessel internals in sour (H₂S containing) and high-chloride environments.
- Chemical Process Industry (CPI): Heat exchangers, process piping, and vessels handling corrosive chemicals and chlorides.
- Marine & Offshore: Seawater cooling systems, ballast systems, and other components exposed to seawater.
- Pulp & Paper Industry: Equipment in digesters and bleach plants.
- High-Strength Structural Components: Where weight reduction and corrosion resistance are required.
| frome ASTM 790 | ||||||||||||
| TABLE 2: Chemical RequirementsA | ||||||||||||
| UNS DesignationB | TypeC | C (max) | Mn (max) | P (max) | S (max) | Si (max) | Ni | Cr | Mo | N | Cu | Other Elements |
| S31200 | 0.03 | 2 | 0.045 | 0.03 | 1 | 5.5 – 6.5 | 24.0 – 26.0 | 1.20 – 2.00 | 0.14 – 0.20 | … | … | |
| S31260 | 0.03 | 1 | 0.03 | 0.03 | 0.75 | 5.5 – 7.5 | 24.0 – 26.0 | 2.5 – 3.5 | 0.10 – 0.30 | 0.20 – 0.80 | W 0.10 – 0.50 | |
| S31500 | 1.20 – 2.00 | 0.03 | 0.03 | 1.40 – 2.00 | 4.2 – 5.2 | 18.0 – 19.0 | 2.50 – 3.00 | 0.05 – 0.10 | … | … | ||
| S31803 | 0.03 | 2 | 0.03 | 0.02 | 1 | 4.5 – 6.5 | 21.0 – 23.0 | 2.5 – 3.5 | 0.08 – 0.20 | … | … | |
| S32003 | 0.03 | 2 | 0.03 | 0.02 | 1 | 3.0 – 4.0 | 19.5 – 22.5 | 1.50 – 2.00 | 0.14 – 0.20 | … | … | |
| S32101 | 0.04 | 4.0 – 6.0 | 0.04 | 0.03 | 1 | 1.35 – 1.70 | 21.0 – 22.0 | 0.10 – 0.80 | 0.20 – 0.25 | 0.10 – 0.80 | … | |
| S32202 | 0.03 | 2 | 0.04 | 0.01 | 1 | 1.00 – 2.80 | 21.5 – 24.0 | 0.45 | 0.18 – 0.26 | … | … | |
| S32205 | 2205 | 0.03 | 2 | 0.03 | 0.02 | 1 | 4.5 – 6.5 | 22.0 – 23.0 | 3.0 – 3.5 | 0.14 – 0.20 | … | … |
| S32304 | 2304 | 0.03 | 2.5 | 0.04 | 0.04 | 1 | 3.0 – 5.5 | 21.5 – 24.5 | 0.05 – 0.60 | 0.05 – 0.20 | 0.05 – 0.60 | … |
| S32506 | 0.03 | 1 | 0.04 | 0.015 | 0.9 | 5.5 – 7.2 | 24.0 – 26.0 | 3.0 – 3.5 | 0.08 – 0.20 | … | W 0.05 – 0.30 | |
| S32520 | 1.5 | 0.035 | 0.02 | 0.8 | 5.5 – 8.0 | 24.0 – 26.0 | 3.0 – 5.0 | 0.20 – 0.35 | 0.5 – 3.00 | … | ||
| S32550 | 255 | 0.04 | 1.5 | 0.04 | 0.03 | 1 | 4.5 – 6.5 | 24.0 – 27.0 | 2.9 – 3.9 | 0.10 – 0.25 | 1.50 – 2.50 | … |
| S32707 | 0.03 | 1.5 | 0.035 | 0.01 | 0.5 | 5.5 – 9.5 | 26.0 – 29.0 | 4.0 – 5.0 | 0.30 – 0.50 | 1 | Co 0.5 – 2.0 | |
| S32750D | 2507 | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 6.0 – 8.0 | 24.0 – 26.0 | 3.0 – 5.0 | 0.24 – 0.32 | 0.5 | … |
| S32760E | 0.03 | 1 | 0.03 | 0.01 | 1 | 6.0 – 8.0 | 24.0 – 26.0 | 3.0 – 4.0 | 0.20 – 0.30 | 0.50 – 1.00 | W 0.50 – 1.00 | |
| S32808 | 0.03 | 1.1 | 0.03 | 0.01 | 0.5 | 7.0 – 8.2 | 27.0 – 27.9 | 0.80 – 1.20 | 0.30 – 0.40 | … | W 2.10 – 2.50 | |
| S32900 | 329 | 0.08 | 1 | 0.04 | 0.03 | 0.75 | 2.5 – 5.0 | 23.0 – 28.0 | 1.00 – 2.00 | … | … | … |
| S32906 | 0.03 | 0.80 – 1.50 | 0.03 | 0.03 | 0.8 | 5.8 – 7.5 | 28.0 – 30.0 | 1.50 – 2.60 | 0.30 – 0.40 | 0.8 | … | |
| S32950 | 0.03 | 2 | 0.035 | 0.01 | 0.6 | 3.5 – 5.2 | 26.0 – 29.0 | 1.00 – 2.50 | 0.15 – 0.35 | … | … | |
| S33207 | 0.03 | 1.5 | 0.035 | 0.01 | 0.8 | 6.0 – 9.0 | 29.0 – 33.0 | 3.0 – 5.0 | 0.40 – 0.60 | 1 | … | |
| Notes: ᵃ Maximum, unless a range or minimum is indicated. Where ellipses (…) appear in this table, there is no minimum and analysis of the element need not be determined or reported. ᵇ For purposes of classification, the UNS number is primary. ᶜ Common name, not a trademark, widely used, Practice E527 and SAE J 1086. ᵈ % Cr + 3.3 × % Mo + 16 × %N ≥ 41. ᵉ % Cr + 3.3 × (% Mo + % W) + 16 × % N ≥ 41. |
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Why Choose TOKO TECH’s 2205 Coiled Tubing?
TOKO TECH ensures the highest quality through stringent process control. The production includes a precise solution annealing and quenching heat treatment to achieve the optimal 50/50 austenite-ferrite balance, which is critical for performance. This is followed by 100% non-destructive testing (Eddy Current or Ultrasonic). Given the material’s application in harsh environments, coils are typically protected with VCI (Vapor Corrosion Inhibitor) packaging to prevent surface corrosion during transit and storage.
In summary, TOKO TECH’s 2205 seamless coiled tubing provides a robust, high-strength solution for demanding applications requiring exceptional resistance to chloride stress corrosion cracking and pitting corrosion. Its unique duplex structure offers a compelling alternative to both standard stainless steels and more expensive nickel alloys, making it a preferred choice for engineers in the oil and gas, chemical processing, and marine industries.