Duplex stainless steels are magnetic and are far more corrosion resistant than more commonly used stainless grades, ie 302 and 316.
Chemical Composition
| Element | Min % | Max % |
| C | – | 0.03 |
| Si | – | 1.00 |
| Mn | – | 2.00 |
| P | – | 0.035 |
| S | – | 0.015 |
| Cr | 21.00 | 23.00 |
| Ni | 4.50 | 6.50 |
| Mo | 2.50 | 3.50 |
| N | 0.10 | 0.22 |
| Specifications | Designations | Key Features | Typical Applications |
ISO 15156-3 | W.Nr 1.4462 | Greater corrosion resistance than stainless steel 300 series. | Chemical processing. |
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 | 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.
