ASME SA789 UNS S32205 Duplex Steel Heat Exchanger Tube
Shape：round
Technique：Cold Rolled
Surface Treatment：Sanded /Mirror/Hairline Brushed
Thickness：0.3-30mm
out Diameter：8-219mm
Length：5.8/6m or Custom
Stock：in Stock
Sample：Available
Transport Package：Standard Sea-Worthy Packing
certified SA 789 UNS S31803 and UNS S32205 Seamless tubing manufacturer
ASME SA789 is a specification for general application seamless and welded ferritic/austenitic (duplex) stainless steel pipes.
If you are looking for high-performance, corrosion-resistant, and long-service-life heat exchanger tubes that meet strict international standards, we can provide duplex stainless steel heat exchanger tubes compliant with ASME SA789 UNS S32205. Our products feature complete specifications, reliable quality, and strong global supply capabilities. We support customized sizes and maintain a stable export system, serving more than 60 countries and regions worldwide to ensure on-time delivery.
Our UNS S32205 stainless steel heat exchanger tubes comply with ASME SA789, ASTM A789, and ASTM A790 standards. They are manufactured using a precision cold-rolling process, followed by solution annealing at 1050°C and either bright annealed (BA) or acid pickled (AP) surface treatment to ensure a PREN (Pitting Resistance Equivalent Number) ≥ 35.We supply various tube forms including UNS S32205 straight tubes, ASTM A789 TP2205 U-bend tubes, and finned tubes. The recommended operating temperature range is −50°C to 300°C. Temperatures above 300°C may lead to embrittlement (475°C embrittlement).
Compared with 304 and 316L stainless steel tubes, UNS S32205 stainless steel tubes for heat exchangers significantly reduce leakage and corrosion failures under harsh operating conditions, extending service life by 3–5 times and lowering total life-cycle costs.
Specification
Physical Properties of ASTM A789 UNS S31803 Duplex Stainless Steel 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 S32205 / 2205 | 782 | 190 | 13.7 | 14.2 | - | 19 | - | 418 | 850 |
Mechanical Composition of ASTM A789 UNS S31803 Duplex 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 S32205 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
Chemical Composition of ASTM A789 UNS S31803 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 |
Outer diameter and Wall Thickness of SAF 2205 Tube
| Types | Out diameter | Wall thickness | Length |
|---|---|---|---|
| NB Sizes (in stock) | 1/8" ~ 8" | SCH 5 / SCH 10 / SCH 40 / SCH 80 / SCH 160 | Upto 6 Meters |
| Duplex 2205 Seamless Tube (Custom Sizes) | 5.0mm ~ 203.2mm | As per requirement | Upto 6 Meters |
| Duplex 2205 Welded Tube (in Stock + Custom Sizes) | 5.0mm ~ 1219.2mm | 1.0 ~ 15.0 mm | Upto 6 Meters |
Note:
Mill test certificates will be issued according to EN10204.3.
All tubes shall be supplied as per applicable ASTM A789 /A789M Specification.
GNEE Stainless Steel is an independent stocker and processor of 2205 stainless steel heat exchanger tubes. With a large inventory and excellent processing capabilities, we can meet the needs of most projects, whether it's in-stock products or custom processing. Click the button below to contact us!
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ASTM A789 Gr. UNS S32205 Tube Testing
Corrosion Test
Chemical Analysis
Reverse-bend and Re. flat tests
Eddy Current Testing
Hydrostatic Testing
Visual Inspection
Mechanical Tests: Tension test, Flattening test, Flaring test, Flange test, Hardness Test and Hydrostatic test
Stainless Steel 2205 Heat Exchanger Tube Factory
With the EN 10204 3.1 Material Technology Certificate (MTC) and complete material traceability, our products are exported to more than 80 countries worldwide, providing reliable and certified duplex stainless steel heat exchanger tubes for critical industrial projects.
high quality packaging
Packed in bundles or ply wooden box wrapped in plastic, and suitably protected for sea-worthily delivery or as requested.
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