Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, ie 302 and 316.
| 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.
