Duplex UNS S31803 / UNS S32205 | 1.4462
- Good weldability in thick plates.
- Good low temperature toughness.
- Resistance to stress corrosion cracking of importance in many applications including hot water tanks, process plant, brewing tanks, and desalination plant.
- Higher strength which is around twice that of Type 304 austenitic stainless steel. This leads to reduced plate thicknesses being used in fabrications reducing the weight which is of particular significance in items such as pressure vessels, storage tanks, and structural applications such as bridges.
Grades
| Type | Grade | EN Steel Number | UNS |
|---|---|---|---|
| Duplex | S31803 | 1.4462 | S32205/2205 |
Properties
| Chemical Analysis (% max or range) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| C | Mn | P | S | Si | Cr | Ni | Mo | N | |
| 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 | |
Mechanical
| Tensile | Yield | Elongation | Hardness |
| MPa min | MPa min | % min | Brinell max |
| 620 | 450 | 25 | 293 |
Specifications
| Thickness (mm) | Plate Sizes (mm) | ||
|---|---|---|---|
| 5 | 12000 x 2000 | ||
| 6 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 8 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 10 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 12 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 15 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 20 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 25 | 12000 x 2000 | 12000 x 2500 | 12000 x 3000 |
| 30 | 6000 x 2000 | 5000 x 2500 | |
| 35 | 6000 x 2000 | 5000 x 2500 | |
| 40 | 6000 x 2000 | 5000 x 2500 | |
| 45 | 6000 x 2000 | 5000 x 2500 | |
| 50 | 6000 x 2000 | 5000 x 2500 | |