Duplex UNS S32205 Fasteners Suppliers & Exporters for USA, Europe & Gulf Projects
Aurum Overseas supplies and exports Duplex 2205 / UNS S32205 fasteners for offshore platforms, desalination plants, refineries, marine systems, and chloride-intensive applications. Their duplex austenitic-ferritic structure combines high mechanical strength with excellent resistance to pitting, crevice corrosion, and chloride stress corrosion cracking.
Duplex 2205 fasteners are suitable for seawater systems, subsea infrastructure, pressure vessels, and offshore piping where conventional stainless steel grades may face localized corrosion or stress corrosion. The alloy also supports long service life and reduced maintenance in demanding environments.
Aurum Overseas supplies Duplex 2205 fasteners to major international markets including the USA, Canada, Mexico, UAE, Saudi Arabia, Germany, France, Italy, Spain, Netherlands, Qatar, and Oman, supporting EPC contractors, manufacturers, distributors, and industrial buyers with reliable export supply.
Duplex 2205 Fasteners Specifications
| Specification | Details |
|---|---|
| Material Grade | Duplex 2205 / UNS S32205 |
| European Grade | EN 1.4462 |
| ASTM Standards | ASTM A182 F60, ASTM A276, ASTM A479 |
| ASME Standards | ASME SA182, SA479 |
| NACE Compliance | NACE MR0175 / ISO 15156 |
| Thread Standards | Metric, UNC, UNF, BSW |
| Size Range | M3 to M56 and custom sizes |
| Length Range | 3 mm to 200 mm+ |
| Surface Finish | Pickled, Passivated, PTFE Coated |
| Inspection | PMI, Hardness, Ferrite, Tensile Testing |
| Certification | EN 10204 3.1 / 3.2 |
Duplex 2205 Fasteners Metallurgy and Mechanical Performance
Duplex 2205 contains a balanced austenitic-ferritic microstructure that provides higher strength and better chloride resistance than conventional stainless steel grades such as 304 and 316L. Its chromium, molybdenum, and nitrogen content further supports resistance to localized corrosion.
This combination makes Duplex 2205 fasteners suitable for offshore engineering, pressure systems, marine equipment, and process environments exposed to seawater, chlorides, and aggressive chemicals.
Duplex 2205 Fasteners for Chloride and Seawater Service
With a PREN value of approximately 35–36+, Duplex 2205 provides strong resistance to pitting and crevice corrosion in chloride-rich environments. Its duplex structure also provides good resistance to chloride stress corrosion cracking under suitable operating conditions.
The alloy is used in subsea piping, offshore drilling systems, refinery pressure equipment, desalination systems, and seawater cooling applications. It can also be considered for selected sour gas environments involving H₂S, CO₂, and aggressive process chemicals.
Duplex 2205 vs 316L Stainless Steel Fasteners
| Property | Duplex 2205 | SS 316L |
|---|---|---|
| PREN Value | 35–36+ | ~25 |
| Yield Strength | 450+ MPa | 170–200 MPa |
| SCC Resistance | Excellent | Poor |
| Chloride Resistance | Excellent | Moderate |
| Offshore Suitability | Highly Recommended | Limited |
| Desalination Applications | Excellent | Moderate |
| Pressure System Performance | Superior | Standard |
ASTM, ASME, EN and NACE Standards
Duplex 2205 fasteners can be supplied to major offshore, refinery, petrochemical, and EPC engineering requirements used across international markets.
| Standard | Description |
|---|---|
| ASTM A182 F60 | Duplex forged components |
| ASTM A276 | Stainless steel bars |
| ASTM A479 | Pressure-service stainless bars |
| ASME SA182 | Pressure equipment specification |
| NACE MR0175 | Sour gas compliance |
| ISO 15156 | Oil & gas material standard |
| API 20E | Offshore bolting systems |
| EN 1.4462 | European duplex designation |
| NORSOK | North Sea offshore compliance |
Duplex 2205 Fasteners Sizes, Threads and Types
Duplex 2205 fasteners are available for offshore structures, refinery equipment, marine assemblies, subsea pipelines, pressure vessels, and industrial process systems.
Types of Duplex 2205 Fasteners
Bolts
Studs
Nuts
Washers
Screws
Threaded Bar
Thread and Size Range
| Parameter | Range |
|---|---|
| Metric Sizes | M3 to M56 |
| Imperial Sizes | 3/8” to 2” |
| Thread Types | UNC, UNF, Metric, BSW |
| Rod Length | Up to 6 meters |
| Custom Manufacturing | Available |
Duplex 2205 Hex Bolt Dimensions
| Nominal Size | Body Dia Max | Head Height Max | Across Flats | Across Corners |
|---|---|---|---|---|
| M10 | 10.00 mm | 6.63 mm | 17.00 mm | 18.48 mm |
| M12 | 12.00 mm | 7.76 mm | 19.00 mm | 20.78 mm |
| M14 | 14.00 mm | 9.09 mm | 22.00 mm | 24.25 mm |
| M16 | 16.00 mm | 10.32 mm | 24.00 mm | 27.71 mm |
Duplex 2205 Bolt Torque Values
| Nominal Diameter | Threads Per Inch | Dry Torque | Lubricated Torque |
|---|---|---|---|
| 1/4" | 20 | 6.5 ft-lb | 4.8 ft-lb |
| 3/8" | 16 | 23.5 ft-lb | 17.7 ft-lb |
| 1/2" | 13 | 57 ft-lb | 43 ft-lb |
| 5/8" | 11 | 115 ft-lb | 86 ft-lb |
Proper lubrication and project-specific engineering torque specifications should always be followed during installation.
Duplex 2205 Fasteners Surface Finishes
| Finish Type | Industrial Purpose |
|---|---|
| Pickled Finish | Removes oxide contamination |
| Passivated Finish | Improves corrosion resistance |
| PTFE Coated | Reduces galling during assembly |
| Machined Finish | Precision engineering use |
Heat Treatment of Duplex 2205 Fasteners
| Process | Temperature Range | Purpose |
|---|---|---|
| Solution Annealing | 1020–1100°C | Restores corrosion resistance |
| Rapid Water Quench | Immediate cooling | Maintains duplex balance |
Testing and Inspection of Duplex 2205 Fasteners
| Inspection Type | Purpose |
|---|---|
| PMI Testing | Material verification |
| Ferrite Testing | Duplex phase balance |
| Tensile Testing | Mechanical strength validation |
| Hardness Testing | Surface hardness control |
| ASTM G48 Testing | Pitting corrosion resistance |
| Dimensional Inspection | Precision compliance |
Fasteners can be supplied with EN 10204 3.1 / 3.2 certification and material traceability according to project requirements.
Duplex 2205 Fasteners for Offshore, Desalination and Petrochemical Applications
Duplex 2205 fasteners are widely used in offshore oil & gas platforms, subsea piping, pressure vessels, desalination plants, heat exchangers, refinery infrastructure, and marine engineering systems exposed to chloride-rich environments.
Their combination of strength and seawater corrosion resistance makes them suitable for desalination facilities, North Sea offshore projects, and Gulf of Mexico infrastructure requiring reliable fastening performance.
- Offshore oil & gas platforms
- Subsea piping
- Pressure vessels
- Desalination plants
- Heat exchangers
- Refinery infrastructure
- Marine engineering systems
- Seawater cooling applications
Global Export Markets
Aurum Overseas supplies its products to major industrial and engineering markets worldwide, supporting EPC contractors, manufacturers, distributors, and industrial buyers with reliable supply and export logistics.
USA
Canada
Mexico
UAE
Saudi
Arabia
Germany
France
Italy
Spain
Netherlands
Belgium
Poland
Qatar
Oman
Kuwait
Bahrain
Export Packaging and Global Logistics Support
Duplex 2205 fasteners are packed using VCI protective materials, sealed export cartons, and fumigated wooden crates to minimize moisture exposure and transit damage. Export documentation, heat-number traceability, and project packaging requirements can also be supported.
Why Industrial Buyers Choose Aurum Overseas
Aurum Overseas supplies Duplex 2205 fasteners for offshore, marine, refinery, desalination, and EPC applications requiring strong corrosion resistance and dependable mechanical performance.
Our capabilities include bulk supply, custom manufacturing, inspection support, certification, traceability, and international project delivery.
Duplex 2205 vs Duplex S31803 Fasteners for Offshore Applications
Duplex 2205 / UNS S32205 fasteners are widely selected for offshore, desalination, and chloride-intensive systems because of their combination of high strength and resistance to localized corrosion. For related duplex requirements, Duplex S31803 Fasteners Suppliers & Exporters can be considered for suitable industrial and pressure-system applications.
For broader material requirements, the Duplex Fasteners Suppliers & Exporters range supports offshore, refinery, marine, and EPC projects with different duplex stainless steel grades.
| Comparison Factor | Duplex 2205 / S32205 | Duplex S31803 |
|---|---|---|
| Duplex Structure | Austenitic-Ferritic | Austenitic-Ferritic |
| Corrosion Resistance | Excellent | Very Good |
| Chloride Resistance | Excellent | Very Good |
| Mechanical Strength | High | High |
| Offshore Service | Highly Suitable | Suitable |
| Typical Applications | Offshore, desalination, subsea | Marine, process and pressure systems |
| Best Suited For | Chloride-intensive service | General duplex applications |
FAQs – Duplex 2205 Fasteners
Duplex 2205 fasteners provide higher yield strength and superior resistance to chloride corrosion compared with 316L stainless steel. They are widely used for offshore and seawater applications where localized corrosion and stress corrosion cracking are concerns.
Yes, Duplex 2205 fasteners are used in offshore platforms, subsea systems, pipelines, manifolds, and pressure equipment because of their resistance to seawater, chlorides, and suitable sour service environments.
Yes. They are suitable for desalination systems such as evaporators, seawater intake systems, heat exchangers, and reverse osmosis infrastructure exposed to chloride-rich seawater.
Aurum Overseas can supply Duplex 2205 fasteners with EN 10204 3.1 / 3.2 certification, PMI, ferrite testing, hardness testing, and third-party inspection documentation according to project requirements.
Yes, Aurum Overseas supplies Duplex 2205 fasteners to the USA, Europe, Gulf countries, and other international industrial markets with export logistics and project support.
Fasteners are packed using VCI protective materials, sealed export cartons, and suitable wooden crates to minimize moisture exposure and transit damage during international transportation.
Request a Quote for UNS S32205 Fasteners
Need Duplex 2205 fasteners for offshore, desalination, refinery, or petrochemical applications? Aurum Overseas offers bulk supply, custom sizes, certification, inspection support, and global delivery.
Contact us for a quotation based on your specifications, quantity, and delivery location.
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