Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, ie 302 and 316.
Duplex is also known as Duplex 2205 and Cronifer 2205 LCN.
| Chemical Composition | Specifications | Designations | Key Features | Typical Applications | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
ISO 15156-3 (NACE MR 0175) |
W.Nr 1.4462 UNS S31803 2205 AWS 167 |
Greater corrosion resistance than stainless steel 300 series. Greater pitting resistance and uniform corrosion resistance to stress corrosion cracking than stainless steel 300 series. Good weldability. |
Chemical processing. Oil and gas refining. Marine environments. Pollution control equipment. |
| Density | 7.8 g/cm³ | 0.282 lb/in³ |
| Melting Point | 1470°C | 2680°F |
| Coefficient of Expansion | 13.7 μm/m °C (21 – 100°C) | 7.610 x 10-6 in/in °F (70 – 212°F) |
| Modulus of Rigidity | 76.9 kN/mm² | 11154 ksi |
| Modulus of Elasticity | 200 kN/mm² | 29008 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 | |
| Solution Annealed | < 1000 | < 145 | -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.
