ASTM A789 covers seamless and welded ferritic/austenitic stainless steel pipe for general corrosion resistance and low/high temperature applications. S32205 is a specific grade of duplex stainless steel covered by this specification.
UNS S32205 stainless steel pipe, also known as Duplex 2205, is a duplex stainless steel that combines high strength with excellent corrosion resistance. Its balanced austenitic and ferritic microstructure improves resistance to stress corrosion cracking, pitting, and crevice corrosion, making it widely used in industries such as oil and gas, chemical processing, desalination plants, heat exchangers, pulp and paper, and marine environments.
Chemical Composition of ASTM A789 S32205
| 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
| 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
| 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
| 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 |
Uses and Applications
1. Oil and Gas Industry: S32205 pipe is widely used in offshore platforms, subsea pipelines, and refineries due to its high strength, corrosion resistance, and ability to withstand harsh environments.
2. Chemical Processing: S32205 pipe plays an important role in applications such as chemical reactors, heat exchangers, and storage tanks.
3. Desalination Plants: S32205 pipe is used in the seawater intake and brine outflow systems of desalination plants.
Inspection Of ASTM A789 UNS S32205 Seamless Pipe
Visual examination, dimensional inspection, PMI chemical analysis, tensile test, flattening test, bend test, eddy-current test, etching test, radiographic examination (for welded pipes), intergranular corrosion test (upon request).
GNEE also provides original factory warranty and customized processing services (such as precision dimensional cutting and special-shaped port processing) to ensure stable product performance and fast delivery, meeting the stringent requirements for pipeline materials in high-temperature and highly corrosive fields. Email: es@gescosteel.com
Packaging and Delivery
| Item | Details |
|---|---|
| Package | Standard export seaworthy package, suitable for all kinds of transportation, or as required by the customer. Each AISI 446 stainless steel electropolished pipe is protected with: • Water-proof paper wrapping • Edge protection strips • Strong wooden pallets or wooden boxes for export |
| Bulk Size | Any customized size can be supplied according to customer requirements. |
| Loading Port | Tianjin Port, Qingdao Port, or any other main seaport in China. |
| Container Capacity | • 1 × 20ft container: Max. load 25 Tons, Max. pipe length 5.8 meters • 1 × 40ft container: Max. load 25 Tons, Max. pipe length 11.8 meters |
| Delivery Time | 7–15 working days after receiving advance payment or depending on the order quantity. |
