Austenitic Outokumpu Supra 316plus (EN 1.4420, ASTM UNS S31655) is designed for highly corrosive environments. Its high chromium and nitrogen content delivers improved corrosion resistance. The grade has high strength, good formability and excellent weldability. Supra 316plus works extremely well for challenging conditions.
Supra 316plus enables lighter structures, that, in turn, can allow increased transport load volumes resulting in a decreased total number of transports needed. These factors can even reduce the fuel consumption, thus Supra 316plus leaving a lower a carbon footprint.
The high chromium content makes the Supra 316plus appropriate for replacing standard grades in many applications. Supra 316plus is ideal for a variety of applications including LNG, tank containers, heat exchangers, water treatment and tubular projects. The grade also works well in architectural applications.
Key benefits of Outokumpu Supra 316plus
Value for money
- Offers value to customer due to improved alloying
- Better cost stability compared to standard Cr-Ni-Mo alloyed austenitic grades
- Makes thinner gauges possible, enabling lighter structures
Improved corrosion resistance
- Considerable improvement over typical austenitic grades
- High chromium and nitrogen content with moderate molybdenum content improve resistance against uniform corrosion
- Good resistance against intergranular corrosion in welds due to low carbon and high nitrogen content
Higher strength
- Remarkably higher strength than standard austenitic stainless steel due to nitrogen alloying
- Grade's strength and elongation combination becomes very attractive in cryogenic temperature down to -196 Celsius
- Makes thinner gauges possible, enabling lighter structures
