Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, ie 302 and 316.
Super Duplex is also known as Alloy 32750 and SAF 2507.
| Chemical Composition | Specifications | Designations | Key Features | Typical Applications | ||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
ISO 15156-3 (NACE MR 0175) |
W.Nr. 1.4410 UNS S32750 2507 AWS 169 |
Excellent resistance to stress corrosion cracking in chloride-bearing environments Excellent resistance to pitting and crevice corrosion High resistance to general corrosion |
Oil and gas exploration Marine applications |
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| Density | 7.8 g/cm³ | 0.28 lb/in³ |
| Melting Point | 1350°C | 2460°F |
| Coefficient of Expansion | 13.5 μm/m °C (25 – 100°C) | 7.5 x 10-6 in/in °F (70 – 200°F) |
| Modulus of Rigidity | 77 kN/mm² | 11000 ksi |
| Modulus of Elasticity | 200 kN/mm² | 29000 ksi |
| Heat Treatment of Finished Parts | |||||
|---|---|---|---|---|---|
| Condition as supplied by Alloy Wire | Type | Temperature | Time (Hr) | Cooling | |
| °C | °F | ||||
| Annealed or Spring Temper | Stress Relieve | 250 | 480 | 1 | Air |
| Properties | ||||
|---|---|---|---|---|
| Condition | Approx. tensile strength | Approx. operating temperature | ||
| N/mm² | ksi | °C | °F | |
| Annealed | 700 – 900 | 102 – 131 | -200 to +300 | -330 to +570 |
| Spring Temper | 1300 – 1900 | 189 – 276 | -200 to +300 | -330 to +570 |
The above tensile strength ranges are typical. If you require different please ask.
