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Super Duplex Steel S32750 Threaded Bars Overview
Aurum Overseas is a premier Super Duplex Steel S32750 Threaded Bars Supplier and leading Super Duplex Steel S32750 Threaded Bars Exporter, offering high-strength 25% Chromium fasteners for marine and chemical environments. Our stock of Super Duplex Grade 2507 Threaded Bars provides structural strength and extreme corrosion resistance under heavy strain.
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Formulated with Molybdenum and Nitrogen, heavy-duty UNS S32750 Threaded Rods achieve a PREN rating above 42. This rich chemistry gives our Super Duplex Steel F53 Threaded Rods maximum protection against crevice corrosion, chloride pitting, and stress corrosion cracking.
Designed for subsea oil manifolds, desalination pumps, flue gas scrubbers, and chemical process equipment, our full-thread bars maintain structural tightness under intense pressure. Contact Aurum Overseas for factory quotes, custom length sawing, and fast global shipping.
Technical Specifications
| Technical Parameter | Specification Standard |
|---|---|
| Material Specifications | ASTM A276, ASTM A479, ASME SA276, ASME SA479, EN 10204 3.1 |
| UNS Designation | UNS S32750 (Super Duplex 2507 / F53) |
| Thread Size Range | M6 to M100 (1/4" to 4.0" Nominal Diameter) |
| Thread Profiles | UNC, UNF, UNEF, Metric Coarse, Metric Fine, Acme Threads |
| Length Options | 1,000 mm, 2,000 mm, 3,000 mm, Custom Cut-to-Length All-Thread Studs |
| Thread Class / Fit | Class 2A / 3A (Imperial) & 6g / 6h (Metric Profile Tolerances) |
| HSN Code | 73181500 |
Chemical Composition & Mechanical Properties
Equivalent Standards
| Grade | Standard | W.Nr. | UNS | SAF |
|---|---|---|---|---|
| Super Duplex Steel S32750 | ASTM A276 / A479 | 1.4410 | S32750 | 2507 |
Chemical Composition (%)
| Chemical Element | Super Duplex Steel S32750 (UNS S32750) |
|---|---|
| Chromium (Cr) | 24.00 – 26.00 |
| Nickel (Ni) | 6.00 – 8.00 |
| Molybdenum (Mo) | 3.00 – 5.00 |
| Nitrogen (N) | 0.24 – 0.32 |
| Carbon (C) | 0.030 max |
| Manganese (Mn) | 1.20 max |
| Silicon (Si) | 0.80 max |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.020 max |
| Iron (Fe) | 58.095 min |
Mechanical & Physical Properties
| Property Parameter | Value / Compliance Boundary |
|---|---|
| Density | 7.80 g/cm³ (0.281 lb/in³) |
| Melting Point | 1350 °C (2460 °F) |
| Tensile Strength (Min) | 750 – 1000 MPa (116,000 Psi) |
| Yield Strength (0.2% Offset, Min) | 550 MPa (80,000 Psi) |
| Elongation (Min) | 15 % |
| Hardness (Max) | 32 HRC / 310 HBW |
Key Advantages of UNS S32750 Threaded Rods
Maximum Strength
High yield strength above 550 MPa allows compact bolt designs and lighter assemblies without losing clamping force.
Superior Pitting Protection
A high PREN rating above 42 stops severe hole pitting and crevice rust in warm salt solutions and strong acids.
No Stress Cracking
Balanced dual-phase structure protects studs from sudden cracking in sour oilfield gas (H₂S) and hot marine environments.
Smooth & Secure Threading
Precision roll-threaded construction prevents thread stripping and jamming during high-torque tightening.
Quality Testing & Inspection
Aurum Overseas subjects every order to strict quality control processes to ensure compliance with international fastener standards and client specifications:
- Chemical Heat Verification (PMI): Spectro / XRF material analysis verifying exact elemental chemistry against ASTM standards.
- Thread Pitch & Gage Inspection: Go/No-Go thread gage and optical comparator testing ensuring class 2A/3A and 6g pitch tolerances.
- Mechanical Property Certification: Factory batch verification of tensile, yield strength, and elongation supported by EN 10204 3.1 MTRs.
- Optional Third-Party Testing: Ferrite count testing (ASTM E562), Corrosion resistance testing (ASTM G48 Method A), or Proof Load testing provided upon request.
Global Export Markets
As an established Super Duplex Steel S32750 Threaded Bars Exporter, Aurum Overseas supplies fully certified ASTM A276 / A479 UNS S32750 threaded rods to global chemical processing, offshore, desalination, and high-strength industrial facilities:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Belgium
Spain
Poland
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Bahrain
Frequently Asked Questions
Super Duplex S32750 contains higher levels of Chromium (25%), Molybdenum (up to 5%), and Nitrogen, providing a higher yield strength (550 MPa vs 450 MPa) and a PREN > 42 compared to 2205's PREN of ~35.
Super Duplex S32750 threaded rods should be limited to service temperatures under 250 °C (482 °F) to avoid microstructural embrittlement caused by sigma phase formation.
They are used in high-pressure reverse osmosis desalination units, offshore platforms, subsea flowlines, and sour gas handling facilities across the UAE, Saudi Arabia, Qatar, and Oman.
Yes. Chemical processing facilities across Germany, the Netherlands, Italy, and the UK rely on S32750 studs for hot organic/inorganic acid storage, heat exchangers, and pickling tanks.
Offshore drilling operators and coastal marine infrastructure in the USA, Canada, and Mexico use S32750 fasteners because they stop rust and severe pitting in harsh Atlantic and Gulf Coast waters.
Contact Aurum Overseas
Contact Aurum Overseas, a trusted Super Duplex Steel S32750 Threaded Bars Supplier & Exporter, for certified high-temperature alloy threaded rods, custom length sawing, and fast international delivery.