ASTM A789 UNS S32205 Duplex Steel Seamless And Welded Tube For Boiler
Sep 24, 2025
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ASTM A789 covers seamless and welded ferritic/austenitic stainless steel pipe for general corrosion resistance and low/high temperature applications.
ASME SA789 UNS S32205 is the standard for duplex stainless steel pipe, covering both seamless and welded forms. It features a mixed ferritic and austenitic microstructure, resulting in high strength and excellent corrosion resistance.
SA789 S32205 cold drawn seamless tube alloy pipe combines the advantages of ferritic and austenitic stainless steels, providing a cost-effective solution for environments with high concentrations of chlorides and corrosive chemicals. Suitable for a variety of industrial applications, it is widely used in industries such as oil and gas, chemical processing, desalination plants, heat exchangers, pulp and paper, and marine environments.
| Product Name: | Boiler Tube | Standard: | ASTM A789 / ASME SA789 |
|---|---|---|---|
| Material: | Duplex Steel | End: | Plain Ends/ Beveled Ends |
| Form: | Straight &U Bend | Type: | Seamless &Welded |
| Packing: | Plywood Case,Bundle | ||
| High Light: |
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Chemical Composition of ASTM A789 S32205 Duplex Steel Tube
| Grade | C | Mn | S | P | Si | Ni | Cr | Mo | N | |
| S32205 | Min | 4.5 | 22.0 | 3.0 | 0.14 | |||||
| Max | 0.03 | 2.0 | 0.02 | 0.03 | 1.0 | 6.5 | 23.0 | 3.5 | 0.20 |
Mechanical Properies of ASTM A789 S32205 Boiler Tube
| Grade | Tensile Str Ksi(Mpa) | Yield Str Ksi(Mpa) | Elongation(%) | Brinell(HBW) | Rockwell C(HRC) |
| S32205 | ≥95(655) | ≥70(485) | ≥25 | ≥290 | ≥30 |
Wall Thickness Tolerance of ASTM A789 Condenser Tube
| OD Range | TYPE | Wall Thickness Tolerance | |
| Average | Mln. | ||
| 0~12.7mm (Incl.) | SMLS&WLD | (+/-15%) | (0,+30%) |
| 12.7~38.1mm (Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
| 38.1~88.9mm (Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
| 88.9~139.7mm(Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
| 139.7~203.2mm(Incl.) | SMLS&WLD | (+/-10%) | (0,+20%) |
Length Tolerance of ASTM A789 UNS S32205 bright annealed tubes
| Length Tolerance | |||
| Range(m) | TYPE | OD range | Tolerance |
| 0~24ft (7.3m Incl.) | SMLS+Hot Finished | All Sizes | 0,+5mm |
| 0~24ft (7.3m Incl.) | SMLS+Cold Finished | <50.8mm | 0,+3mm |
| 0~24ft (7.3m Incl.) | SMLS+Cold Finished | 50.8mm(Incl.) to Up | 0,+5mm |
| 0~24ft (7.3m Incl.) | WLD | <50.8mm | 0,+3mm |
| 0~24ft (7.3m Incl.) | WLD | 50.8mm(Incl.) to Up | 0,+5mm |
ASTM A789 UNS S32205 Tube Corrosion Resitance
| Corrosion Resitance | |
| Pitting Resistance | 35 to 40 |
| General Corrosion Resistance | 300°C (572°F) |
ASTM A789 Gr. UNS S32205 Tube Testing
Flattening Test
Micro and MacroTest
Pitting Resistance Test
Positive Material Identification – PMI Testing
Intergranular Corrosion (IGC) Test
Flaring Test
Hardness Test
Mechanical Testing Such as Tensile of Area
Chemical Analysis – Spectro Analysis
If you have project requirements for ASME SA789 UNS S32205 bright annealed tubing, please feel free to place an order. GNEE maintains a large inventory of popular products for your selection. These tubing can be processed into a variety of practical forms, including seamless and welded. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.
Packaged in waterproof paper and steel strapping, these tubing meets standard export seaworthy packaging requirements and can be customized to suit various shipping methods.
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