Stainless Steel Super Duplex Type 2507
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.
Choosing the Right Material for Your Application:
Read our blog: 2205 vs 2507 vs F55
Stainless Super Duplex Type 2507 Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A276 and ASME SA276*
| Carbon | 0.030 | Silicon | 0.80 |
| Chromium | 24.0-26.0 | Copper | 0.50 |
| Nickel | 6.0-8.0 | Nitrogen | 0.24-0.32 |
| Molybdenum | 3.0-5.0 | Phosphorus | 0.035 |
| Manganese | 1.20 | Sulfur | 0.020 |
*Maximum, unless range is indicated
Stainless Super Duplex Type 2507 Physical Properties
| Density, lb/in3 | 0.280 |
| Modulus of Elasticity, psi | 29.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 7.5 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 8 |
| Specific Heat, Btu/lb ˚F | 0.12 |
| Electrical Resistivity, Microhm-in | 31.5 |
Stainless Super Duplex Type 2507 Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A276 and ASME SA276
| Yield Strength, min. (ksi) | 80 |
| Tensile Strength, min. (ksi) | 116 |
| Elongation, min. (%) | 15 |
| Hardness, max. (HBW) | 310 |
Stainless Super Duplex Type 2507 Standards
Typical standards for Type 2507
| ASTM A276 |
| ASTM A479 |
| ASME SA276 |
| ASME SA479 |
Your Source for Stainless Super Duplex Type 2507
At Double Eagle Alloys, we supply Stainless 2507 in long bar, flanges, pipe, sheet, gaskets, fittings and header plugs engineered for these demanding services. Contact our team to learn how Stainless 2507 can support long-term performance and reliability.
Questions? We’d love to help. Contact us today to discuss your needs or to check current availability.
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Data shown are typical and provided for informational purposes only. Values should not be considered minimums or maximums for specification or final design. Actual product data may vary, and information may be revised without notice.