| Customization: | Available |
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| Type: | Stainless Steel Pipes |
| Standard: | ASTM, AISI, GB, JIS, EN |
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| Stainless Steel S32205/S31803 Tube Standards | SA 789 alloy 2205, astm a790 duplex 2205, a790 gr 2205ASTM A213, ASTM A249, ASTM A269, ASME SA213, ASME SA249, ASME SA269, EN 10216-5 TC1 / TC2, PED 97/23/EC, AD 2000, NACE MR0175/ISO 15156 |
| S32205/S31803 SEAMLESS Stainless Steel Aerospace Tubing | AMS 5557, AMS 5897 (Canceled & non-current specs include MIL-T-8808, MIL-T-8973) |
| S32205/S31803 WELDED & DRAWN Stainless Steel Aerospace Tubing | AMS 5556, AMS 5575 (Canceled & non-current specs include MIL-T-6737, MIL-T-8606, MIL-T-8808) |
| Stainless Steel S32205/S31803 Seamless Tube Size | 3.35 mm OD To 101.6 mm OD |
| Stainless Steel S32205/S31803 Welded Tube Size | 6.35 mm OD To 152 mm OD |
| Swg & Bwg | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg. |
| Stainless Steel S32205/S31803 tubing wall thickness | 0.020″ -0.220″, (special wall thicknesses available) |
| SS S32205/S31803 tube Length | Single Random, Double Random, Standard & Cut length |
| S32205/S31803 Stainless Steel Tube Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
| Stainless Steel S32205/S31803 tube Form | Round, Coil, Square, Rectangular, Boiler, Hydraulic, Straight or 'U' bent Tubes, Hollow, LSAW Tubes Etc. |
| Stainless Steel S32205/S31803 Tube Type | Seamless, ERW, EFW, Welded, Fabricated |
| Electropolished | (EP) Electropolished for Ultra High Purity Systems |
| Non-Electropolished | (BA) Bright Annealed or (AP) Annealed & Pickled for High-Purity, (CFOS) Cleaned for Oxygen Grade Service or Corrosive Systems |
| I.D. Surface Finish Options | 5, 7 & 10 µin. Ra |
| JIS | 8A to 250A |
| Tolerances | In accordance with: ASTM: A269 & A632, JIS: G 3459 |
| S32205/S31803 stainless steel tubing End | Plain End, Beveled End, Treaded, Ends are suitable for orbital welding |
| Marking | All S32205/S31803 Stainless Steel tubes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer's request.) |
| S32205/S31803 stainless steel tubing Application | Oil Tube, Gas Tube, Fluid Tube, Boiler and Heatexchanger |
| Value Added Service | Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc. |
| Specialize in | Stainless Steel S32205/S31803 Capillary Tube & Other Odd Size |
| Stainless Steel S32205/S31803 Heat Exchanger & Condenser Tubes | |
| Stainless Steel S32205/S31803 Hydraulic tubing with OD up to 50.8 mm (2.0 in.) are delivered in bright annealed condition | |
| Stainless Steel S32205/S31803 hydraulic tube with OD larger than 50.8 mm are supplied in the annealed and pickled condition, Or in polished condition | |
| Marking & Traceability | Each Stainless Steel S32205/S31803 Tubing is traceable to its producing mill and heat by an identification number etched within 24″ (610mm) of one end. |
| S32205/S31803 stainless steel tubing Test Certificate | Manufacturer Test Certificate according to EN 10204 3.1 B |
| Laboratory Test Certificate from Govt. Approved Lab. | |
| Under Third Party Inspection | |
| S32205/S31803 stainless steel tubing Testing & Inspection | Visual inspection • Surface roughness measurement • Helium-leak testing • Scanning Electron Microscopy (SEM) • Auger Electron Microscopy (AES) • Election Spectroscopy for Chemical Analysis (ESCA or XPS) • Particle testing • Moisture testing |
CORROSION RESISTANCE Alloy 2205 excels in resisting chloride-induced pitting and stress corrosion cracking.
ELEVATED TEMPERATURE RESISTANCE The ASME Boiler and Pressure Vessel Code sets an upper-temperature limit of 600°F (315°C). Prolonged exposure to higher temperatures can result in embrittlement.
MECHANICAL PROPERTIES Alloy 2205 offers more than double the strength of conventional austenitic stainless steels in the annealed condition. It can also be provided in the cold-worked condition with a yield strength exceeding 160 ksi, maintaining excellent toughness even at temperatures as low as -50°F (-10°C).
WORKABILITY Alloy 2205 is suitable for cold forming, though it requires attention due to its high work-hardening rate. Intermediate anneals may be necessary. Post-forming annealing is recommended for optimal stress corrosion resistance.
Our forming capabilities are unparalleled, featuring advanced extrusion and cold working technologies for tube and pipe manufacturing. We boast one of the world's largest pilger mills and a unique hydroforming process for precision fittings.
As a vertically integrated manufacturing powerhouse, Jiangsu Daxun Alloy Co., Ltd. delivers an all-encompassing, one-stop-shop solution. From managing comprehensive projects to handling intricate machining tasks, our extensive capabilities encompass straightening, drilling, honing, trepanning, cutting, testing, boring, machining, laser welding, polishing, turning, and a myriad of specialized services.
Equipped with vertical and horizontal presses ranging from a formidable 12,000 tons to an impressive 35,000 tons, Jiangsu Daxun Alloy Co., Ltd. boasts the industry's most extensive pipe extrusion capabilities. This enables us to manufacture pipes in the longest lengths and largest diameters available, setting new benchmarks in the industry.
Your Premier Source for ASTM A789 UNS S32205 Duplex Stainless Steel Seamless Pipes and 2205 (S31803) Duplex Stainless Steel Welded Pipes Alloy 2205: A Duplex Stainless Steel Enriched with Nitrogen for Enhanced Corrosion Resistance. This remarkable material stands out in welding applications and, when annealed, offers over twice the strength of conventional austenitic stainless steels. Compared to Alloy 316, Alloy 2205 excels in corrosion resistance across diverse conditions. As the most widely used duplex stainless steel, it is also recognized as UNS N31803 and 22-Chromium. Comprising 22% chromium, 3% molybdenum, and 5-6% nickel, Alloy 2205 demonstrates exceptional fatigue strength and robust resistance against stress corrosion cracking, crevice corrosion, pitting, erosion, and general corrosion in challenging environments.
At Daxun Alloys, we expertly produce stainless steel alloy 2205 tubing in a comprehensive array of forms and sizes. Our offerings include seamless, welded, precision, and capillary tubing. Adhering to stringent industrial standards set by ASTM, ASME, ISO, UNS, and EN, our alloy 2205 products meet the highest levels of quality and reliability.
Daxun Alloys: Your Trusted Source for Duplex 2205 Stainless Steel Pipes. As a renowned stockist, we maintain an extensive inventory of Duplex 2205 Round Pipes, Square Pipes, Polished Pipes, Electro Polished Pipes, and Cold Drawn Stainless Steel Pipes. Operating from our facility in China, we have been a leading manufacturer of Duplex 2205 Seamless and Welded Pipes since 1999, holding ISO 9001 certification. With a stock of over 25,000 tonnes, we are one of the largest stockists of ASTM A789 UNS S32205 pipes in China. Originally established as a Duplex Stainless Steel Pipe Trader, we now lead as a stocking distributor of Duplex SS 2205 Seamless Pipes. With a reputation for excellence, we proudly export ASTM A789 UNS S31803 Seamless Pipes worldwide. Our vast inventory includes SCH 40, SCH 80, SCH 160, SCH 10, SCH XS, and SCH XXS Duplex 2205 pipes, cementing our status as China's foremost provider. Enjoy the most competitive prices when you purchase 2205 Duplex Stainless Steel Pipes from us.
Chemical Composition of 2205/S32205/S31803 Stainless Steel Pipe
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
| 2205 | 0.03 | 2 | 1 | 0.03 | 0.02 | min: 21.0 | min: 2.5 | min: 4.5 | min: 0.08 |
| (S31803) | max | max | max | max | max | max: 23.0 | max: 3.5 | max: 6.5 | max: 0.20 |
| 2205 | 0.03 | 2 | 1 | 0.03 | 0.02 | min: 22.0 | min: 3.0 | min: 4.5 | min: 0.14 |
| (S32205) | max | max | max | max | max | max: 23.0 | max: 3.5 | max: 6.5 | max: 0.20 |
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
| (MPa) min | 0.2% Proof | (% in 50mm) min | |||
| (MPa) min | Rockwell C (HR C) | Brinell (HB) | |||
| UNS S31803 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
| UNS S32205 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
| Grade 2205 | Density | Elastic | Mean Co-eff of Thermal | Thermal | Specific | Electrical | |||
| (kg/m3) | Modulus(GPa) | Expansion (μm/m/°C) | Conductivity (W/m.K) | Heat | Resistivity | ||||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | 0-100°C( J/kg.K) | (nΩ.m) | |||
| UNS S32205 / UNS S31803 | 782 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
Duplex 2205 stainless steel pipe is a unique blend of ferritic and austenitic stainless steel, composed of 22% chromium, 3% molybdenum, and 5-6% nickel. As the most commonly used duplex stainless steel grade, it boasts double the yield strength of regular austenitic grades. This superior strength is complemented by excellent fatigue resistance and unparalleled resistance to stress corrosion cracking, crevice, pitting, and general corrosion, even in the most challenging conditions.
Most manufacturers recommend a maximum hot forming temperature between 2010 and 2100°F (1100 and 1150°C). If the workpiece is not uniformly heated, cooler edges may risk cracking.
The Duplex 2205 Stainless Steel Tube is renowned for its exceptional formability across various manufacturing processes. However, its high strength can pose challenges. Even with sufficiently powerful equipment, the substantial springback due to the grade's high strength must be carefully considered.
Duplex 2205 presents a slightly higher machining challenge compared to 300 series austenitic stainless steels. The increased cutting forces lead to quicker tool wear. Here are some essential machining guidelines: A) Utilize a powerful and rigid machine with strong tool and workpiece mounts; B) Minimize tool extensions to reduce vibration; C) Ensure the tool nose radius is not excessively long to maintain a sharp edge while providing necessary strength; D) Plan the machining sequence to keep the depth of cut below the work-hardened layer from the previous operation.
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