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Pathan Durgadevi Udyan, Ground Floor, 25 Plot No 74/80, Patra Chawl, Maruti , Mandir Marg, Second Street, Girgaon, Mumbai, Maharashtra 400004Tubotech Alloys is a leading supplier and exporter of Duplex Steel 31803 / 32205 Fasteners in the United Kingdom, offering premium-quality fastening solutions for demanding industrial applications. Duplex Steel 31803 and 32205 Fasteners combine the advantages of austenitic and ferritic stainless steels, delivering exceptional strength, corrosion resistance, and durability in aggressive environments.
Our Duplex Steel 31803 / 32205 Fasteners are manufactured according to international standards and are widely used in offshore platforms, marine engineering, chemical processing plants, oil & gas industries, desalination plants, and power generation facilities throughout the UK. We supply a complete range of fasteners in various sizes, dimensions, and specifications to meet diverse industrial requirements.
Tubotech Alloys supplies a comprehensive range of Duplex Steel 31803 / 32205 Fasteners, including:
These fasteners are available in customized sizes, coatings, and threading options according to customer specifications.
| Specification | Details |
|---|---|
| Material Grade | Duplex Steel UNS S31803 / UNS S32205 |
| Standards | ASTM A182, ASTM A276, ASTM A479 |
| Fastener Standards | ASTM A193 B7, ASTM F593, ASTM F594 |
| Size Range | M3 to M100 |
| Length | Customized as per requirement |
| Thread Type | Metric, UNC, UNF, BSW |
| Form | Bolts, Nuts, Washers, Screws, Studs, Threaded Rods |
| Finish | Plain, PTFE Coated, Hot Dip Galvanized, Electro Polished |
| Element | S31803 (%) | S32205 (%) |
|---|---|---|
| Carbon (C) | 0.03 Max | 0.03 Max |
| Chromium (Cr) | 21.0 – 23.0 | 22.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 | 3.0 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 | 0.14 – 0.20 |
| Manganese (Mn) | 2.0 Max | 2.0 Max |
| Silicon (Si) | 1.0 Max | 1.0 Max |
| Phosphorus (P) | 0.03 Max | 0.03 Max |
| Sulfur (S) | 0.02 Max | 0.02 Max |
| Iron (Fe) | Balance | Balance |
| Property | S31803 | S32205 |
|---|---|---|
| Tensile Strength | 620 MPa Min | 655 MPa Min |
| Yield Strength | 450 MPa Min | 450 MPa Min |
| Elongation | 25% Min | 25% Min |
| Hardness | 290 HB Max | 293 HB Max |
| Density | 7.8 g/cm³ | 7.8 g/cm³ |
The superior mechanical strength of Duplex Steel 31803 / 32205 Fasteners allows them to withstand high-pressure and high-temperature conditions while maintaining excellent resistance to stress corrosion cracking.
Due to their outstanding corrosion resistance and high strength, Duplex Steel 31803 / 32205 Fasteners are extensively used in:
Used in offshore platforms, subsea equipment, refineries, and pipelines where chloride-induced corrosion is a major concern.
Ideal for marine structures, ship components, seawater handling systems, and coastal installations.
Widely used in reactors, pressure vessels, storage tanks, and chemical handling equipment.
Suitable for thermal, nuclear, and renewable energy plants due to excellent mechanical performance.
Preferred for seawater desalination systems because of superior pitting and crevice corrosion resistance.
Used in bleaching plants and process equipment exposed to aggressive chemicals.
Employed in pumps, valves, filtration systems, and treatment infrastructure.
These fittings are crucial in ensuring smooth, dependable, and ordinary fluid and gas waft at some stage in various high-stakes programs.
We source high-grade Duplex Steel materials and manufacture fasteners that comply with international quality standards.
From bolts and nuts to washers and threaded rods, we offer complete fastening solutions for every industrial requirement.
Every batch undergoes rigorous testing to ensure dimensional accuracy, strength, corrosion resistance, and reliability.
Our efficient manufacturing process allows us to provide high-quality Duplex Steel fasteners at competitive prices throughout the UK market.
With strong logistics support, we ensure prompt delivery across England, Scotland, Wales, and Northern Ireland.
We provide tailor-made fasteners based on customer drawings, dimensions, and project specifications.
Tubotech Alloys supplies Duplex Steel 31803 Fasteners and Duplex Steel 32205 Fasteners to customers throughout the United Kingdom, including London, Birmingham, Manchester, Liverpool, Glasgow, Sheffield, Leeds, Bristol, Newcastle, and Edinburgh. Our products are trusted for critical applications where performance, safety, and reliability are essential.
S32205 is an enhanced version of S31803 with tighter control of chemical composition and improved corrosion resistance, particularly against pitting and crevice corrosion.
Yes. These fasteners offer excellent resistance to seawater corrosion, making them ideal for marine and offshore applications.
Oil & gas, chemical processing, marine engineering, desalination plants, power generation, and water treatment industries commonly use Duplex Steel 32205 Fasteners.
Yes. We manufacture and supply custom-sized Duplex Steel 31803 and 32205 Fasteners according to customer requirements and international standards.
Duplex Steel Fasteners provide higher strength, better chloride resistance, improved stress corrosion cracking resistance, and longer service life compared to conventional stainless steel grade
Upgrade your assembly with Tubotech for excellence and built to closing. Contact us nowadays to get a quote or examine more about our product range.
Tubotech delivers precision-engineered tubing, fittings, and fasteners with innovative solutions and customizable options. Trusted for quality and durability, we serve industries requiring reliable, high-performance piping and instrumentation products.
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