Table of Contents
- Super Duplex Steel S32750 Round Bars Overview
- Technical Specifications
- Mechanical Properties & Chemical Composition
- Types of Super Duplex Steel S32750 Round Bars
- Key Advantages of UNS S32750 Round Bars
- Key Applications of Super Duplex Steel S32750 Round Bars
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Super Duplex Steel S32750 Round Bars Overview
Aurum Overseas supplies certified high-alloy dual-phase stainless steel bars engineered for ultra-high strength and extreme pitting resistance. As a leading Super Duplex Steel S32750 Round Bars Supplier and Exporter, we stock premium inventory for subsea environments, offshore platforms, and chemical systems.
-(f53)-round-bar.webp "Super Duplex Steel S32750 Round Bars")
We specialize in precision Super Duplex Steel Grade 2507 Round Bars heat-treated for a balanced 50/50 ferrite-austenite matrix. Our stock includes ground bright bars for CNC machining alongside heavy Super Duplex Steel F53 Round Bars forged for structural shafts, while accommodating UNS S32760 Round Bars needs.
We export these specialized high-nitrogen dual-phase alloy bars across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Technical Specifications
| Technical Parameter | Super Duplex Steel S32750 (2507 / F53) |
|---|---|
| Material Designation | Super Duplex 2507 / F53 / UNS S32750 |
| UNS Number | UNS S32750 |
| Werkstoff Number | 1.4410 |
| Manufacturing Standards | ASTM A276, ASTM A479, EN 10088-3, NACE MR0175 / ISO 15156 |
| Diameter Capability | 3 mm to 500 mm (1/8" to 20" NB) |
| Length Specifications | 3 Meters, 6 Meters, Cut-to-Length |
| Dimensional Tolerances | ISO h8, h9, h10, h11, DIN 1013 |
| Delivery Conditions | Solution Annealed & Rapid Water Quenched (1020°C – 1100°C) |
Mechanical Properties & Chemical Composition
Equivalent Grades of A276 Super Duplex S32750 Bars
| Standard | Werkstoff Nr. | UNS |
|---|---|---|
| Super Duplex S32750 | 1.4410 | S32750 |
Chemical Composition of Super Duplex S32750 Round Bars
| Chemical Element | Composition Range (%) |
|---|---|
| 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 |
| Chromium (Cr) | 24.00 – 26.00 |
| Molybdenum (Mo) | 3.00 – 5.00 |
| Nickel (Ni) | 6.00 – 8.00 |
| Nitrogen (N) | 0.24 – 0.32 |
| Iron (Fe) | 58.095 min |
Mechanical Properties of Super Duplex S32750 Round Bars
| Property | Value |
|---|---|
| Ultimate Tensile Strength | 750 MPa (116,000 psi) min |
| Yield Strength (0.2% Offset) | 550 MPa (80,000 psi) min |
| Elongation (%) | 15% min |
| Hardness (Brinell) | 310 HB max |
| Density | 7.8 g/cm³ (0.281 lb/in³) |
| Melting Point | 1350°C (2460°F) |
Types of Super Duplex Steel S32750 Round Bars
Aurum Overseas supplies ASTM A276 and ASTM A479 Super Duplex Steel S32750 Round Bars in precision bright and heavy forged conditions for subsea and chemical service.
Super Duplex Steel S32750 Bright Bars
Super Duplex Steel S32750 Forged Bars
Key Advantages of UNS S32750 Round Bars
Ultra-High Yield Strength
Delivers a minimum yield strength of 550 MPa, allowing thinner component designs without sacrificing pressure ratings.
Exceptional Pitting Resistance
High chromium, molybdenum, and nitrogen content yields a PREN ≥42 to prevent crevice corrosion in hot seawater.
Resists Stress Corrosion Cracking
The balanced 50/50 dual-phase structure provides near immunity to stress corrosion cracking in warm chloride fluids.
High Erosion Resistance
Tough mechanical matrix resists fluid wear, abrasion, and high-velocity fluid erosion in heavy-duty pumps and valves.
Strong Acid Defense
Maintains chemical stability in aggressive organic and inorganic acid environments, including hot nitric and dilute sulfuric acids.
Key Applications of Super Duplex Steel S32750 Round Bars
| Industry Sector | Typical Components | Operating Conditions |
|---|---|---|
| Subsea & Offshore Oil | Wellhead manifolds, riser clamps, and valve shafts | Deep-water pressure, sour gas (H2S), and aggressive marine brine |
| Desalination Plants | High-pressure pump shafts, rotors, and energy recovery devices | Continuous high-velocity concentrated brine flow and cavitation |
| Chemical Processing | Heat exchanger bars, agitators, and vessel tie rods | Concentrated hot organic/inorganic acids and chloride contaminants |
| Marine & Submarine Systems | Propeller shafts, rudder stocks, and heavy drive couplings | Saltwater immersion, cyclic mechanical fatigue, and bending stress |
| Flue Gas Cleaning | Scrubber shafts, damper mechanisms, and spray nozzles | Hot acidic slurries, wet sulfur dioxide, and particulate erosion |
Quality Testing & Inspection
Every batch of Super Duplex Steel S32750 Round Bars supplied by Aurum Overseas undergoes strict quality testing:
- Positive Material Identification (PMI): XRF analysis verifies exact concentrations of chromium, molybdenum, nickel, and nitrogen to ensure proper PREN ratings.
- Phase Balance & Microstructure Inspection: Metallographic testing per ASTM E562 confirms a 45–55% ferrite-austenite phase balance.
- Intermetallic Phase Evaluation: Corrosion testing per ASTM A923 Method B or C verifies complete freedom from detrimental sigma and chi phases.
- Ultrasonic Inspection: NDT inspection on forged bars per ASTM A388 ensures absolute internal sound quality free of internal voids or bursts.
Global Export Markets
As an established Super Duplex Steel S32750 Round Bars Exporter, Aurum Overseas supplies fully certified UNS S32750 Round Bars to global energy and marine engineering centers:
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 features a PREN (Pitting Resistance Equivalent Number) greater than 42, making it vastly superior to standard 2205 duplex steels in hot chloride environments.
S32750 contains chromium (25%), molybdenum (4%), and nitrogen, while S32760 includes small intentional additions of tungsten and copper for specialized acid environments.
Rapid water quenching prevents the formation of brittle intermetallic sigma phases that can form between 600°C and 1000°C, preserving mechanical toughness and corrosion resistance.
Super Duplex S32750 is recommended for service below 300°C, as prolonged exposure to higher temperatures can cause embrittlement due to 475°C phase precipitation.
All orders include EN 10204 3.1 Mill Test Certificates covering heat numbers, full chemical composition, tensile and impact test values, ferrite count, and PMI verification.
Contact Aurum Overseas
Aurum Overseas provides fully certified Super Duplex Steel S32750 Round Bars engineered to meet critical global project specifications.
Contact our technical sales team for availability, customized sizes, or immediate price quotes: