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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 manufacturer, supplier, and exporter of Duplex Steel 31803 / 32205 Fasteners in Germany, offering premium-quality fastening solutions for demanding industrial applications. Duplex Steel 31803 and 32205 are widely recognized for their exceptional combination of strength, corrosion resistance, and durability. These fasteners provide superior resistance to pitting, crevice corrosion, stress corrosion cracking, and chloride-induced corrosion, making them ideal for harsh environments.
Our Duplex Steel 31803 / 32205 Fasteners in Germany are manufactured according to international standards and undergo stringent quality checks to ensure reliability and long service life. We supply fasteners to industries across Germany, including oil & gas, chemical processing, marine engineering, power generation, construction, and offshore platforms.
Tubotech Alloys offers a comprehensive range of Duplex Steel fasteners, including:
These fasteners are available in various sizes, dimensions, coatings, and specifications to meet diverse industrial requirements.
| Element | UNS S31803 (%) | UNS S32205 (%) |
|---|---|---|
| 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 |
| Carbon (C) | Max 0.03 | Max 0.03 |
| Manganese (Mn) | Max 2.0 | Max 2.0 |
| Silicon (Si) | Max 1.0 | Max 1.0 |
| Phosphorus (P) | Max 0.03 | Max 0.03 |
| Sulfur (S) | Max 0.02 | Max 0.02 |
| Iron (Fe) | Balance | Balance |
| Property | Duplex Steel 31803 / 32205 |
|---|---|
| Tensile Strength | 620 MPa Min |
| Yield Strength | 450 MPa Min |
| Elongation | 25% Min |
| Hardness | 290 HB Max |
| Density | 7.8 g/cm³ |
| Modulus of Elasticity | 200 GPa |
These mechanical properties provide superior strength compared to conventional austenitic stainless steel fasteners, enabling enhanced performance in high-pressure and corrosive environments.
| Specification | Details |
|---|---|
| Material Grade | Duplex Steel UNS S31803 / UNS S32205 |
| Standard | ASTM A182, ASTM A276, ASTM A479, ASTM A240 |
| Fastener Standards | ASTM A479, ASTM A276, ASME SA479 |
| Bolt Standards | ASTM A193 Grade B8M, ASTM A193 Duplex Steel |
| Nut Standards | ASTM A194 |
| DIN Standards | DIN 933, DIN 931, DIN 934, DIN 125, DIN 127 |
| ISO Standards | ISO 4014, ISO 4017, ISO 4032 |
| Thread Type | Metric, UNC, UNF, BSW, BSF, NPT |
| Size Range | M3 to M100, 3/16″ to 4″ |
| Length Range | Up to 5 Meters or Customized |
| Form | Bolts, Nuts, Screws, Stud Bolts, Threaded Rods, Washers, U-Bolts, Anchor Bolts |
| Threading | Full Thread, Partial Thread, Custom Thread |
| Surface Finish | Plain, Pickled, Passivated, Polished, PTFE Coated |
| Manufacturing Process | Hot Forged, Cold Forged, CNC Machined |
| Testing | PMI Testing, Mechanical Testing, Chemical Analysis, Hardness Testing |
| Certification | EN 10204 3.1, Mill Test Certificate (MTC), Third-Party Inspection |
| Packaging | Wooden Boxes, Cartons, Pallets, Export-Seaworthy Packaging |
| Origin | Made in India |
| Supply Capability | Germany and Worldwide Export |
The outstanding corrosion resistance and high mechanical strength of Duplex Steel fasteners make them suitable for numerous industries, including:
Used in offshore drilling rigs, subsea equipment, pipelines, and refineries.
Ideal for handling aggressive chemicals and corrosive process environments.
Provides excellent resistance against seawater corrosion and chloride attack.
Widely used in thermal, nuclear, and renewable energy plants.
Suitable for bleaching plants and chemical processing equipment.
Used in desalination systems and water purification facilities.
Preferred for bridges, structural assemblies, and coastal construction projects.
Ensures hygienic and corrosion-resistant fastening solutions.
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 raw materials that comply with international standards.
A complete selection of bolts, nuts, washers, screws, studs, and custom fasteners.
Every fastener undergoes dimensional, mechanical, and chemical testing before dispatch.
We provide cost-effective fastening solutions without compromising quality.
Efficient logistics ensure timely deliveries to major industrial regions throughout Germany.
Customized dimensions, coatings, and specifications available upon request.
Our experienced team provides expert guidance for selecting the right fasteners for your application.
Duplex Steel 31803 and 32205 Fasteners are high-strength corrosion-resistant fastening components made from duplex stainless steel containing both austenitic and ferritic microstructures.
S32205 is an enhanced version of S31803 with tighter chemistry controls and improved corrosion resistance, particularly in chloride-rich environments.
They are widely used in oil and gas, marine, chemical processing, power generation, water treatment, and construction industries.
Yes. Duplex Steel 32205 offers excellent resistance to seawater corrosion, pitting, crevice corrosion, and stress corrosion cracking.
Tubotech Alloys provides certified quality products, competitive pricing, custom manufacturing, global export capabilities, and reliable delivery throughout Germany.
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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