Specifications
- Bar: ASTM A276
2507 Duplex is the most popular of the nitrogen-strengthened duplex alloys. It has corrosion resistance equivalent to the 6% molybdenum alloys, such as AL6XN®. The minimum pitting resistance number for this material is 42. Depending on the source, a minimum pitting resistance number of 32 to 40 is required for service in seawater. Compared to 316L Stainless, it can range from 2 to 3 times as strong.
Specifications & Technical Data
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| Density | 0.282 lb/in3 |
| Melting Range | 2570 – 2660 °F |
| Poisson’s Ratio | 0.3 |
| Electrical Resistivity | 0.80 ohm mx10-6 |
| Temperature, °F | 68 | 212 | 392 | 572 |
| Coefficient* of Thermal Expansion, in/in°F x 106 | – | 7.2 | 7.5 | 7.8 |
| Thermal Conductivity, Btu • ft/ft2 • hr • °F | 8.6 | 9.2 | 9.8 | 10.4 |
| Modulus of Elasticity Dynamic, psi • 106 | 29 | 28.1 | 27 | – |
| Ultimate Tensile Strength, ksi | 116 (min) |
| 0.2% Yield Strength, ksi | 80 (min) |
| Elongation, % | 15 (min) |
| Hardness, HRC | 32 (max) |
| Temperature, ° F | 212 | 392 | 482 |
| Ultimate Tensile Strength, ksi | 99 | 93 | 91 |
| 0.2% Yield Strength, ksi | 65 | 58 | 55 |
| Alloy | PREn | Critical Pitting Temperature (CPT) °F |
| 2507 | 42 | 185 |
| 2205 | 35 | 120 |
| 316L | 24 | 64 |
PREn= Cr% + 3.3*Mo% +16*N% except for UNS S32760 where PREn= Cr% + 3.3*(Mo% + 0.5*W%) + 16*N%
