- Heat exchangers
- Flanges and valves
Outokumpu Supra grades
Supra 316/4401 stainless steel
Supra 316/4401 is a widely used Molybdenum alloyed austenitic stainless steel. It’s an all-purpose product with very good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Supra 316/4401 can be delivered with a variety of surface finishes.
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- EN: 1.4401
- ASTM type: 316
- ASTM UNS: S31600
- Microstructure: Austenitic
- C: 0.04
- Cr: 17.2
- Ni: 10.1
- Mo: 2.1
- N: -
- Others : -
Supra 316L/4404 stainless steel
Supra 316L/4404 is a low-carbon alternative to Supra 316/4401. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion.Supra 316L/4404 is suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.
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- EN: 1.4404
- ASTM type: 316L
- ASTM UNS: S31603
- Microstructure: Austenitic
- Chemical industry
- Petrochemical industry
- Pulp and paper industry
- Textile industry
- Food and beverage industry
- Pharmaceutical industry
- Medical applications
- Flanges and valves
- C: 0.02
- Cr: 17.2
- Ni: 10.1
- Mo: 2.1
- N: -
- Others : -
Supra 316LN/4406 stainless steel
316L suitable for low temperatures
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- EN: 1.4406
- ASTM type: 316LN
- ASTM UNS: S31653
- Microstructure: Austenitic
- Cryogenic tank
- C: 0.02
- Cr: 17.2
- Ni: 10.3
- Mo : 2.1
- N: 0.14
- Others : -
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.
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- EN: 1.4420
- ASTM type : -
- ASTM UNS: S31655
- Microstructure: Austenitic
- Process and transport tanks
- Water treatment and pipes
- Heat exchangers
- Architectural applications
- C: 0.02
- Cr: 20.3
- Ni: 8.6
- Mo: 0.7
- N: 0.19
- Others : -
Supra 316L/SANS4402 stainless steel
Supra 316L/SANS4402 is a high-strength, high-formability product often used in container transports and where there is an elevated temperature requirement.
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- SANS: 1.4402
- ASTM type: -
- ASTM UNS: -
- Microstructure: Austenitic
- C: 0.02
- Cr: 17.2
- Ni: 10.1
- Mo: 2.1
- N: -
- Others: -
Supra 316/4436 stainless steel
Supra 316/4436 is a product with high resistance to non-oxidizing acids and chloride-containing media due to higher molybdenum content. It has good formability and weldability.
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- EN: 1.4436
- ASTM type: 316
- ASTM UNS: S31600
- Microstructure: Austenitic
- Pulp and paper industry equipment
- Pharmaceutical industry equipment
- Flanges and valves
- C: 0.04
- Cr: 16.9
- Ni: 10.7
- Mo: 2.6
- N: -
- Others: -
Supra 316L/4435 stainless steel
Supra 316L/4435 is a alternative to 316L/4404 with higher molybdenum and nickel content for enhanced corrosion resistance and formability.
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- EN: 1.4435
- ASTM type: 316L
- ASTM UNS: S31603
- Microstructure: Austenitic
- Urea plants
- Pulp and synthetic fiber plants
- Flanges and valves
- Cryogenic
- Hydrogen
- C: 0.02
- Cr: 17.3
- Ni: 12.6
- Mo : 2.6
- N: -
- Others : -
Supra 316Ti/4571 stainless steel
Supra 316Ti/4571 is a titanium-stabilized alternative to Supra 316L/4404 – mainly used in Germany for elevated temperature applications. Due to its titanium-stabilization this product is weldable in all thickness ranges.
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- EN: 1.4571
- ASTM type: 316Ti
- ASTM UNS: S31635
- Microstructure: Austenitic
- Flue gas applications
- Flanges and valves
- C: 0.04
- Cr: 16.8
- Ni: 10.9
- Mo: 2.1
- N: -
- Others: Ti
Supra 4429 stainless steel
A special 316L with increased content of Nitrogen and Molybdenum
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- EN: 1.4429
- ASTM type: 316LN
- ASTM UNS: S31653
- Microstructure: Austenitic
- Pharmaceutical
- Chemical
- Petrochemical
- Cryogenic
- Cellulose
- Food processing industries
- Hydrogen
- C: 0.02
- Cr: 17.2
- Ni: 12.2
- Mo: 2.6
- N: 0.15
- Others: -
Supra 724L stainless steel
A modified version of 4435 for Urea applications
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- EN: 1.4435
- ASTM type: 316L
- ASTM UNS: S31603
- Microstructure: Austenitic
- Urea reactors
- C: 0.02
- Cr: 17.3
- Ni: 12.6
- Mo: 2.6
- N: -
- Others: -
Supra 444/4521 stainless steel
Supra 444/4521 is a nickel-free molybdenum-alloyed ferritic stainless steel with very good corrosion resistance, good cold formability and high strength. It allows for thinner walls in tanks and is not prone to stress corrosion cracking.
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- EN: 1.4521
- ASTM type: 444
- ASTM UNS: S444000
- Microstructure: Ferritic
- Hot water tanks
- Drinking water pipes
- C: 0.02
- Cr: 18.0
- Ni: -
- Mo: 2.04
- N: -
- Others: Nb,Ti
Circle Green Supra 316L/4404 stainless steel
Circle Green Supra 316L/4404 is a low-carbon alternative to Supra 316/4401. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion. Circle Green Supra 316L/4404 is suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.
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- EN: 1.4404
- ASTM type: 316L
- ASTM UNS: S31603
- Microstructure: Austenitic
- Chemical industry
- Petrochemical industry
- Pulp and paper industry
- Textile industry
- Food and beverage industry
- Pharmaceutical industry
- Medical applications
- Flanges and valves
- C: 0.02
- Cr: 17.2
- Ni: 10.1
- Mo: 2.1
- N: -
- Others : -
For Highly Corrosive Environments
Supra
The Supra range contains austenitic and ferritic stainless steels grades for medium to highly corrosive environments in PRE range 22 – 26.
The most widely used molybdenum alloyed austenitic stainless grade, Supra 316L/4404 (EN 1.4404) , defines the overall landscape of the Supra range. The Supra range is complemented by a modern stabilized molybdenum alloyed nickel-free 18% chromium ferritic stainless steel alternative, Supra 444/4521 (EN 1.4521).
The latest Supra range addition is the austenitic Supra 316plus/4420 (EN 1.4420). Thanks to higher chromium and nitrogen, Supra 316plus has higher corrosion resistance and strength compared to 316L.
Supra range Cr-Ni-Mo austenitic stainless steels have excellent corrosion resistance, welding and forming, especially stretch-forming characteristics. Austenitic steels exhibit very high ductility also down to cryogenic temperatures. Due to the higher toughness and work hardening nature of austenitic stainless steels, special attention may be needed during forming and machining compared to ferritic stainless or carbon steels.
Modern Supra range stabilized molybdenum alloyed ferritic stainless steel, Supra 444/4521, has excellent corrosion resistance, welding and deep-drawing properties. Nickel-free ferritic stainless steels grades have excellent resistances to chloride-induced stress-corrosion cracking. Ferritics have good heat transfer properties that can be utilized in applications where uniform and fast heat transfer is preferred. Good heat transfer with lower thermal expansion eases weldability via smaller weld distortion and buckling behavior than austenitics. In addition, ferritics have similar machinability as carbon streels, due to low work hardening characteristics.
Supra range grades can be used in a wide range of applications supported with a broad selection of surface finishes from mills and service centers.
Standards and approvals for Supra range
EN ISO 18286 | Hot-rolled stainless steel plates – Tolerances on dimensions and shape |
EN 10051 | Hot-rolled steel strip. |
EN 10088-1 | Stainless steels – list of stainless steels |
ISO 15510 | Stainless steels – chemical composition |
EN ISO 9445 | Cold-rolled stainless narrow strip, wide strip, plate/sheet and cut lengths. |
ASTM A 480 | General requirements for flat-rolled stainless and heat resisting steel |
ASTM A 959 | Harmonized standard grade compositions for wrought stainless steels |
ASME IID | Materials – Physical properties tables |
EN 10028-7 | Flat products for pressure purposes – Stainless steels |
EN 10088-2 | Stainless steels – sheet/plate and strip for general purposes |
EN 10088-3 | Stainless steels – semi-finished products, bars, rods sections for general purposes |
EN 10088-4 | Technical delivery conditions for sheet/plate and strip |
EN 10088-5 | Technical delivery conditions for bars, rods wire, sections and bright products of corrosion resisting steels for construction purposes |
EN 10095 | Heat resisting steels and nickel alloys |
EN 10151 | Stainless steel strip for springs |
EN 10302 | Creep resisting steels, nickel and cobalt alloys |
ASTM A 167 | Stainless and heat-resisting Cr-Ni steel plate, sheet, and strip |
ASTM A 176 | Stainless and heat-resisting Cr steel plate, sheet, and strip |
ASTM A 240 | Cr and Cr-Ni stainless steel plate, sheet and strip for pressure vessels |
ASTM A276 | Stainless steel and heat resisting steel bars and shapes |
ASTM A479/479M | Stainless steel bars for boilers/pressure vessels |
ASTM A493 | Stainless steel and heat-resisting steel rod and wire for cold heading and forging |
ASTM A555 | General requirements for stainless and heat resistant steel wire and wire rod |
ASTM A 666 | Austenitic stainless steel sheet, strip, plate, bar for structural and architectural applications |
ASME IIA | Materials. Part A – Ferrous Material Specifications |
Outokumpu meets the most common certifications and approvals around the world, including:
- AD 2000 Merkblatt
- Approval of Material Manufacturers
- Factory Production Control Certificate
- ISO 9001
- ISO 14001
- ISO 50001
- ISO/TS 16949
- NORSOK
- OHSAS 18001