2507 – Super Duplex Stainless Steel: Extreme Corrosion & Strength Solution

Overview

2507 is a super duplex stainless steel, engineered to deliver exceptional corrosion resistance and ultra-high mechanical strength for the most demanding industrial environments. It features a balanced austenitic-ferritic structure (50-50%) with a high chromium (24.00-26.00%), nickel (6.00-8.00%), and molybdenum (3.00-5.00%) content, plus nitrogen (0.24-0.32%) for enhanced strength and corrosion resistance. This grade offers superior resistance to pitting, crevice, and stress corrosion cracking in highly aggressive media, including seawater, acidic solutions, and chloride-rich environments. Its high tensile strength eliminates the need for thicker sections, reducing weight and cost in heavy-duty applications. It exhibits moderate magnetic properties due to its ferrite component.

Chemical Composition (wt%)

C ≤ 0.03, Si ≤ 0.80, Mn ≤ 1.20, P ≤ 0.030, S ≤ 0.020, Cr: 24.00-26.00, Ni: 6.00-8.00, Mo: 3.00-5.00, N: 0.24-0.32

Typical Mechanical Properties (Annealed Condition)

Tensile Strength (Rm): ≥ 795 MPa; Yield Strength (Rp0.2): ≥ 550 MPa; Elongation (A): ≥ 20%; Brinell Hardness (HB): ≤ 310

Core Advantages

Super duplex structure provides ultra-high strength and extreme corrosion resistance; outperforms 2205 in aggressive chloride and acidic environments; excellent resistance to stress corrosion cracking and pitting; high nitrogen content enhances strength without compromising ductility; cost-effective for high-load, corrosive applications.

Applications

Offshore oil and gas equipment, seawater desalination plants, chemical and petrochemical reactors, acid processing pipelines, marine propulsion systems, and high-pressure, high-corrosion industrial components.

Equivalent Grades

UNS S32750, EN 1.4410, STS2507, SUS2507, GB 022Cr25Ni7Mo4N

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.