Typical applications
- Process and transport tanks
- Water treatment and pipes
- Heat exchangers
- Architectural applications
Supra 316plus
Outokumpu Supra range
Outokumpu Supra 316plus
Outokumpu Supra 316plus is designed for highly corrosive environments, but it can even decrease companies’ carbon footprint due to its strength that allows lighter structures.
Outokumpu Supra 316Plus
Supra 316plus stainless steel
Supra 316plus is the highest strength stainless steel in the Supra range. It is a cost-efficient, 21Cr lower-nickel/molybdenum alternative to traditional molybdenum austenitics like Supra 316L. This product has good formability, excellent weldability, and is usable in cryogenic applications.
EN 1.4420
ASTM type -
ASTM UNS S31655
Microstructure Austenitic
Datasheet
Download Supra range datasheet
for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Chemical composition
C 0.02
Cr 20.3
Ni 8.6
Mo 0.7
N 0.19
Others -
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Go directly to Outokumpu Supra 316Plus
|
Finish EN |
Finish ASTM |
Thickness (mm) |
Width (mm) |
|
1D |
1 |
3.50–8.00 |
up to 1250 |
|
1D |
1 |
6.00–8.00 |
up to 1500 |
|
2E RAP |
1 |
2.30–4.50 |
up to 1000 |
|
2E RAP |
1 |
2.60–4.50 |
up to 1250 |
|
2E RAP |
1 |
3.20–4.50 |
up to 1500 |
|
2B |
2B |
0.70–5.00 |
up to 1250 |
|
2B |
2B |
1.00–5.00 |
up to 1500 |
|
2K |
4 |
0.70–4.00 |
up to 1250 |
|
2K |
4 |
1.00–4.00 |
up to 1500 |
|
STANDARDS AND APPROVALS |
||
|
EN 10028-7: 2016 |
Flat products made of steels for pressure purposes – Part 7: Stainless steels. |
Available |
|
PED Directive 2014/68/EU |
European Pressure Equipment Directive |
Available |
|
ASTM A240/A240M-17 |
Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications |
Available |
|
ASME Code Case 2903 |
Case 2903 20Cr-8.5Ni-0.7Mo-0.2N, UNS S31655 Austenitic Steel, alloy Plate, Sheet, and Strip Section VIII, Division 1 |
Available |
|
AD 2000-Merkblatt W2 |
Available Particular Material Appraisal (PMA) for AD 2000-Merkblatt W2 |
Available |
|
Lloyd's Register approval |
Certificate No: MD00/1165/0008/1. Steelmaking, Semi-Finished Products, Plates, Hot Rolled Coil and Coil |
Available |
|
DNV-GL approval |
Certificate No: AMMM00001DW. Steelmaking and Rolled Steel Products |
Available |
|
ASTM A249/A249M-16a |
Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes |
Available |
|
ASTM A269/A269M-15a |
Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service |
Available |
|
ASTM A358/A358M-15 |
Standard Specification for Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications |
Available |
|
ASTM A554-16 |
Standard Specification for Welded Stainless Steel Mechanical Tubing |
Available |
|
ASTM A312/S312M-17 |
Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes |
Available |
|
NACE |
NACE MR0103 / ISO 17945 and NACE MR0175/ISO 15156-1 / NACE MR0175/ISO 15156-3 |
Available |
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
