2507 Stainless Steel Pipe | Super Duplex Excellence for Extreme Conditions
✓ Unrivaled Strength: Yield strength ≥550 MPa – 2.5x stronger than 316L – enabling lighter, thinner designs.
✓ Corrosion Supremacy: PREN ≥42, validated by 15,000+ hours in ASTM G48 Method D seawater crevice corrosion testing.
✓ Stress Corrosion Immunity: Resists chloride-induced SCC up to 200°C (392°F) under NACE TM0177.
✓ Welding Precision: Maintains phase balance with AWS A5.9 ER2594 filler, no post-weld heat treatment required.
2507 Stainless Steel Pipe (UNS S32750)
Engineered to dominate the most aggressive environments, 2507 super duplex stainless steel pipe combines a balanced austenitic-ferritic microstructure with ultra-high alloy content (25% Cr, 7% Ni, 4% Mo, 0.3% N) to deliver unmatched strength and corrosion resistance. Certified to ASTM A789/A790, NACE MR0175/ISO 15156, and ASME SA-789, this premium grade outperforms standard duplex steels in chloride-rich, acidic, and high-pressure applications, making it indispensable for subsea oil & gas, desalination, and chemical processing industries.
- Sizes: 1/8″ to 48″ OD (Seamless/Welded)
- Wall Thickness: 0.5mm to 60mm (Schedule 5S to XXS)
- Surface Finishes: Pickled & Passivated, Electropolished (Ra ≤0.3μm), Bead-Blasted
- Mechanical Properties: Yield Strength ≥550 MPa | Tensile Strength ≥750 MPa | Elongation ≥25% | Hardness ≤310 HBW
| Parameter Category | Value/Description |
|---|---|
| Material Standard | ASTM A789/A790, EN 10217-7, UNS S32750 |
| Chemical Composition (%) | C ≤0.03, Cr 24–26, Ni 6–8, Mo 3.0–4.0, N 0.24–0.32, Mn ≤1.2, Si ≤0.8, P ≤0.035, S ≤0.02 |
| Tensile Strength (MPa) | ≥800 (Solution Annealed) |
| Yield Strength (MPa) | ≥550 (Solution Annealed) |
| Elongation (%) | ≥15 (in 50mm gauge length) |
| Hardness | Brinell (HBW): ≤310; Rockwell (HRC): ≤32 (Solution Annealed) |
| Density (g/cm³) | 7.80 |
| Melting Range (°C) | 1350–1400 |
| Thermal Conductivity (W/m·K) | 15.0 (at 20°C) |
| Thermal Expansion (10⁻⁶/°C) | 13.0 (20–100°C) |
| Electrical Resistivity (Ω·m) | 0.85 × 10⁻⁶ (at 20°C) |
| Elastic Modulus (GPa) | 200 |
| Magnetic Permeability | Weakly magnetic (due to duplex microstructure) |
| Corrosion Resistance | Exceptional resistance to chloride stress corrosion cracking (SCC), pitting, and crevice corrosion (PREN ≥42). Resistant to sulfuric acid, acetic acid, and seawater. |
| Heat Treatment | Solution Annealing: 1020–1120°C followed by rapid cooling (water quenching). |
| Surface Finishes | Seamless/Welded, Hot-rolled (black), Cold-drawn (bright), Pickled & Passivated. |
| Dimension Range | – OD: 6mm–1200mm – Wall Thickness: 0.5mm–50mm – Length: 1–12m (custom lengths available). |
| Standards & Schedules | ASTM (SCH 10S, 40S, 80S), EN (Light/Medium/Heavy Series), NORSOK MDS D45. |
| Key Applications | Offshore oil & gas pipelines, seawater desalination plants, chemical processing systems, subsea equipment, high-pressure valves, heat exchangers. |
2507 Stainless Steel Pipe Applications
| Industry | Critical Uses | 2507 Pipe Advantage |
|---|---|---|
| Subsea Oil & Gas | X-mas tree piping, downhole tools | Resists H₂S cracking at 25,000 ppm and 150°C (302°F). |
| Desalination | High-pressure RO membranes, brine heaters | Withstands 45,000 ppm chloride at 90°C (194°F). |
| Chemical Processing | Sulfuric acid concentrators, HCl reactors | 0.005mm/year corrosion rate in 70% H₂SO₄ at 80°C. |
| Nuclear Waste | Spent fuel casks, reprocessing systems | Immune to nitric acid corrosion up to 95% concentration. |
2507 Stainless Steel Pipe Product Packaging
2507 stainless steel pipes are engineered for critical applications in oil & gas, construction, and medical industries. To preserve surface integrity and dimensional accuracy during transit, we deploy advanced packaging systems and logistics strategies tailored for tubular products.
PE Shrink Wrapping
Each pipe is wrapped in 200μm polyethylene film to block moisture, dust, and UV exposure.
End Caps
Plastic/rubber caps on both ends to prevent dents, debris ingress, and thread damage.
Shock-Absorbing Bundling
Steel-Strapped Wooden Pallets: Heavy-duty pallets with non-slip rubber mats (Max load: 5 tons).
QR-coded tags
QR-coded tags linked to Mill Test Certificates (MTC), EN 10204 3.1 standards, and pipe batch history.
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 Stainless Steel Pipe 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 compare to 2205 duplex pipes?
A: 2507 offers 30% higher strength and PREN 42 vs 34, mandatory for >20,000 ppm chloride or >150°C service.
Q2: What welding parameters prevent sigma phase formation?
A: Use ER2594 filler with 0.8-1.2 kJ/mm heat input, interpass T ≤100°C, and argon backing gas (99.999% purity).
Q3: Are pipes compliant with nuclear industry standards?
Yes, all shipments include:
- ASME Section III Division 3 certification
- ISO 9328-4 NDT reports (UT/PT/RT)
- NACE MR0103 for sour service
Q4: What’s the MOQ for custom electropolished pipes?
Standard sizes: 5 tons.
Custom finishes: 10 tons (lead time 30 days).
Q5: How to prevent pitting in stagnant seawater?
A: Specify Electropolished + Passivated Finish – reduces pitting potential by 95% (per ASTM A967 Method C).
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