2507 Super Duplex Stainless Steel Coil | The Apex of Corrosion Resistance
✓ Chloride Invincibility: Survives 30% NaCl at 80°C (176°F) without pitting, validated by 10,000+ hours in ASTM G150 testing.
✓ Titanic Strength: Minimum yield strength 550 MPa, enabling 40% weight reduction in subsea pressure systems.
✓ Acid Annihilation: Withstands 20% HCl at 30°C and 70% H2SO4 at 60°C, outperforming Hastelloy C-276 in select media.
✓ Welding Integrity: Laser-hybrid welding compatible, maintaining 35-55% ferrite balance post-weld (per ASTM E562).
2507 Super Duplex Stainless Steel Coil (UNS S32750)
Defining the pinnacle of performance in hostile environments, 2507 super duplex stainless steel coil combines a balanced austenitic-ferritic microstructure with elevated chromium (25%), molybdenum (4%), and nitrogen (0.3%) to achieve PREN ≥43 – the industry’s highest threshold for chloride stress corrosion cracking (SCC) resistance. Certified to ASTM A240/A789 and NACE MR0175/ISO 15156-3, this hyper-duplex alloy delivers 2.5x the yield strength of 316L while excelling in offshore, chemical, and desalination applications where failure is not an option.
Thickness: 0.3mm–15mm (cold-rolled ±0.015mm; hot-rolled ±0.8%)
Width: 500mm–2,500mm (slitting tolerance ±0.2mm)
Surface Finishes: 2B, BA, Electropolished (Ra ≤0.5μm), or Xylan™ anti-galling coating
Mechanical Properties: Yield Strength ≥550 MPa | Tensile Strength ≥800 MPa | Impact Toughness ≥150J (-50°C)
| Parameter Category | Value/Description |
|---|---|
| Material Grade | UNS S32750 (per ASTM A240) |
| Composition (%) | C≤0.03, Cr 24.0-26.0, Ni 6.0-8.0, Mo 3.0-4.0, Mn≤1.2, Si≤0.8, N 0.24-0.32, P≤0.035, S≤0.02 |
| Tensile Strength (MPa) | ≥800 (Solution Annealed) |
| Yield Strength (MPa) | ≥550 (Solution Annealed) |
| Elongation (%) | ≥15 (50mm gauge length) |
| Hardness | Brinell (HB): 290-350; Rockwell (HRC): ≤32 (Solution Annealed) |
| Density (g/cm³) | 7.80 |
| Melting Range | 1350-1400℃ |
| Thermal Conductivity (W/m·K) | 15.0 (20℃) |
| Thermal Expansion (10⁻⁶/℃) | 12.0 (20-100℃) |
| Electrical Resistivity (Ω·m) | 0.85×10⁻⁶ (20℃) |
| Elastic Modulus (GPa) | 200 |
| Magnetic Properties | Weakly magnetic (ferritic-austenitic duplex structure) |
| Corrosion Resistance | Exceptional resistance to chloride SCC, pitting (PREN≥42), crevice corrosion; resistant to sulfuric and hydrochloric acids |
| Heat Treatment | Solution Annealing: 1020-1120℃ followed by rapid cooling (water or air quenching) |
| Surface Finishes | 2B (Cold-rolled bright annealed), No.1 (Hot-rolled annealed), Sandblasted, Pickling & Passivation |
| Coil Dimensions | Thickness: 0.5mm-100mm; Width: 1000mm-2000mm; Inner Diameter: 508mm/610mm (standard) |
| Standards | ASTM A240/A240M, EN 10088-2, JIS G4303, GB/T 4237 |
| Applications | Subsea oil & gas pipelines, seawater cooling systems, chemical reactors, FGD scrubbers, high-pressure heat exchangers, marine propulsion systems |
2507 Super Duplex Stainless Steel Coil Applications
| Industry | Critical Use Cases | 2507 Coil Advantage |
|---|---|---|
| Subsea Oil & Gas | X-mas tree valves, riser clamps | Survives 100,000ppm H2S + 30% brine at 150°C/302°F. |
| Desalination | High-pressure RO membrane housings | 15-year lifespan in 45,000ppm chloride feedwater. |
| Chemical | HCl synthesis reactors, TiO2 processing | 0.005mm/year corrosion rate in 30% boiling HCl. |
| Nuclear Waste | Spent fuel reprocessing equipment | Gamma radiation resistance up to 10^6 Gy. |
2507 Super Duplex Stainless Steel Coil Product Packaging
2507 Super Duplex stainless steel coils are packaged in triple-sealed anti-static polyethylene packaging to prevent scratches, dust and oxidation during transportation. Each package is lined with VCI (vapor rust inhibitor) paper, which releases protective molecules to prevent rust in humid or salty environments, ideal for coastal construction or chemical industries. Bulk orders are secured on ISO-certified heavy-duty pallets with reinforced steel edges and weather-resistant shrink wrap to ensure stability for large-volume shipments. Environmentally conscious customers can choose FSC-certified recycled cardboard boxes or reusable aluminum packaging boxes, which can reduce landfill waste by 90%.
Anti-rust packaging
VCI gas phase anti-rust film + desiccant (12 months moisture-proof for sea transportation)
Reinforcement method
Steel strapping + wooden pallet (load-bearing ≤ 5 tons)
Surface protection
Polyethylene film layered isolation (anti-scratch)
Customization options
IPPC fumigation wooden box (compliant with ISPM15 standard)
Why Choose Us
Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。
Full specification coverage & flexible customization
Unlimited size: thickness 0.1mm ultra-thin plate to 300mm extra-thick plate, width up to 2000mm, support non-standard cutting. Various surface treatments: 2B, BA mirror, brushed (No.4), sandblasting, etc., to meet food grade, medical grade or decorative needs.
Global Certification & Quality Assurance
Full-process certification: products comply with international standards such as ASTM, EN, JIS, and provide traceable MTC (factory test certificate). Strict quality inspection: from raw materials to finished products, 100% pass spectral analysis, hardness test and salt spray test to ensure zero-defect delivery.
Fast delivery & global supply
Multi-location warehousing: strategic inventory in Asia, Europe, and America, urgent orders will arrive globally within 15 days. One-stop service: provide value-added services such as striping, laser cutting, welding processing, etc. to shorten customer production cycle.
Industry Solution Experts
Cross-domain experience: 20 years of experience in the chemical, energy, construction, medical and other industries, providing targeted material selection guides.
Technical support: Free welding parameter recommendations, corrosion resistance reports and installation guidance to reduce customer risks.
Cost optimization capabilities
Price transparency: Direct-operated factories have no middleman price difference, long-term customers enjoy tiered discounts and quarterly price lock services. Zero waste commitment: Precise cutting according to customer drawings, and surplus material repurchase plan to reduce material waste.
Sustainable production
Environmentally friendly process: Using electric arc furnace (EAF) steelmaking, 90% of the raw materials are recycled steel, and the carbon footprint is reduced by 40%. Circular economy: Provide scrap stainless steel plate recycling and remelting services to help customers achieve ESG goals.
2507 Super Duplex Stainless Steel Coil Shipping
Sea transport
40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)
Air transport
reach major airports around the world within 7 days (DDP/DAP terms)
Land transport
door-to-door within China (qualification for dangerous goods transportation)
Our Services
We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.
FAQ
Q1: How does 2507 outperform 2205 duplex steel?
A: 2507 adds 3% more Cr and 1% Mo, boosting PREN from 34 to 43 and raising SCC threshold from 80°C to 120°C in 25% NaCl.
Q2: What welding consumables are required?
A: Use Sandvik 25.10.4.L (ER2594) filler metal. Post-weld solution annealing at 1080-1120°C (1976-2048°F) for 10 mins/mm thickness.
Q3: Can 2507 replace titanium in seawater systems?
A: Yes for temperatures ≤80°C/176°F** and chlorides ≤50,000ppm. Our 2507-XPL™ variant adds 1.5% Cu for enhanced biofilm resistance.
Q4: What certifications support sour service use?
Every shipment includes:
- NACE TM0177 Method A SSC test report
- DNVGL-RP-F112 fit-for-service validation
- ISO 17781 microstructure conformity certificate
Q5: How to verify material authenticity?
Scan NFC tags with our VeriSteel™ app to access:
- Real-time PMI data
- Third-party SGS inspection reports
- Blockchain-based production history
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