Super Duplex 2507
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Grades
Super Duplex 2507
Super Duplex 2507 is a premium material with a correspondingly higher cost than standard stainless steels. It is chosen when the application demands exceptional corrosion resistance and strength, and it has a proven track record in some of the most challenging and aggressive environments in various industries.
2507 stainless steel was designed for demanding applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. As a duplex (ferritic-austenitic) stainless steel, 2507 combines the most desirable characteristics of both ferritic and austenitic steels.
The duplex microstructure gives this grade high strength, excellent resistance to chloride stress corrosion cracking, high thermal conductivity, and a low coefficient of thermal expansion. In addition, 2507’s high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion that is similar to the 6% Mo super austenitic stainless steels.
Specifications
Super Duplex 2507 is a popular grade of stainless steel known for its exceptional corrosion resistance and high strength. Here are some specifications for Super Duplex 2507:
Chemical Composition:
- Chromium (Cr): 24.0 – 26.0%
- Nickel (Ni): 6.0 – 8.0%
- Molybdenum (Mo): 3.0 – 5.0%
- Nitrogen (N): 0.24 – 0.32%
- Copper (Cu): 0.5 – 0.7%
- Tungsten (W): 0.5%
- Silicon (Si): 0.8% max
- Manganese (Mn): 1.2% max
- Phosphorus (P): 0.03% max
- Sulfur (S): 0.02% max
Mechanical Properties:
- Tensile Strength: 116 ksi (800 MPa) minimum
- Yield Strength: 80 ksi (550 MPa) minimum
- Elongation: 15% minimum
- Hardness: 270 Brinell (HB) maximum
Physical Properties:
- Density: 7.8 g/cm³
- Melting Range: 1390-1450°C (2534-2642°F)
Corrosion Resistance:
- Super Duplex 2507 offers excellent resistance to various corrosive environments, including chloride-rich and acidic conditions. It is often used in applications where regular duplex stainless steels may not provide adequate protection.
Weldability:
- Super Duplex 2507 is weldable using most standard welding methods. However, it is essential to follow specific procedures to maintain its corrosion resistance and mechanical properties.
Applications:
- Super Duplex 2507 is commonly used in industries such as oil and gas, chemical processing, desalination, pulp and paper, and marine engineering. It is suitable for a wide range of applications where a combination of high strength and excellent corrosion resistance is required.
Standards:
- Super Duplex 2507 complies with various international standards, including ASTM A789, ASTM A790, and EN 10088-3.
Material Certification and Traceability
At Satyam Overseas, we prioritize Material Certification and Traceability. Our materials, meeting ASTM and ASME standards, come with 3.1 Mill Test Certificates as a guarantee of compliance. Additionally, upon request, we provide 3.2 Mill Test Certificates for added assurance. Every material is clearly marked and accompanied by a corresponding certificate, meticulously linking markings to certification. This meticulous approach ensures complete accountability and unwavering reliability throughout our supply chain.
Chemical Composition
| Cr | Ni | Mo | C | N | Mn | Si | Cu | P | S | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
|
24.0-26.0 |
6.0-8.0
|
3.0-5.0
|
0.030 Max
|
.24-.32
|
1.20 Max
|
0.80 Max
|
0.50 Max
|
0.035 Max
|
0.020 Max
|
Balance |