Outokumpu Supra range

Stainless steels for highly corrosive environments

The Supra range contains stainless steel products designed for highly corrosive environments. Outokumpu Supra range stainless steels have a good resistance to uniform corrosion in many organic and inorganic chemicals. The addition of molybdenum enhances the alloy’s corrosion resistance in many acidic environments.

Key grades

Supra 316/4401

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.

Supra 316L/4404

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.

 

We believe in the world that lasts forever

Why Supra range

  • Austenitics are highly formable and weldable and used in facades, claddings, storage tanks, and heat exchangers.
  • Includes the well-known Outokumpu Supra 316L/4404 as well as several alternatives.
  • Home of Outokumpu's latest austenitic stainless steel grade innovation: Supra 316plus. 
  • Ferritic stainless steels are nickel free, have good formability, and can be used in applications with elevated temperatures.
  • Why Outokumpu

    • Outokumpu is a global leader in stainless steel, and innovator of the first stainless steels in the world.
    • A strong customer focus, sustainability, and technical excellence are at the heart of everything we do.
    • As a customer you benefit from our strong R&D and technical support

    Why stainless steel

    • The durability of stainless steel means that it is not only the best, but also the most economically sustainable choice for a wide range of applications.
    • All of our products are made from an average of 85% recycled material and are fully recyclable at the end of their lifecycles.

    Outokumpu Supra stainless steel grades

    Supra 316/4401

    Description 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.

    EN 1.4401

    ASTM type 316

    ASTM UNS S31600

    Microstructure Austenitic

    Typical applications

    • Heat exchangers
    • Flanges and valves

    Datasheet Outokumpu Supra range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication.

    Chemical composition

    C 0.04

    Cr 17.2

    Ni 10.1

    Mo 2.1

    N -

    Others -

    Supra 316L/4404

    Description 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.

    EN 1.4404

    ASTM type 316L

    ASTM UNS S31603

    Microstructure Austenitic

    Typical applications

    • Chemical industry
    • Petrochemical industry
    • Pulp and paper industry
    • Textile industry
    • Food and beverage industry
    • Pharmaceutical industry
    • Medical applications
    • Flanges and valves

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C 0.02

    Cr 17.2

    Ni 10.1

    Mo 2.1

    N -

    Others -

    Supra 316plus

    Description The highest strength stainless steel in the Supra range. Supra 316plus 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

    Typical applications

    • Process and transport tanks
    • Water treatment and pipes
    • Heat exchangers
    • Architectural applications

    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 -

    Supra 316L/SANS4402

    Description A high-strength, high-formability product often used in container transports and where there is an elevated temperature requirement.

    SANS 1.4402

    ASTM type -

    ASTM UNS -

    Microstructure Austenitic

    Typical applications • Container tanks

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C 0.02

    Cr 17.2

    Ni 10.1

    Mo 2.1

    N -

    Others -

    Supra 316/4436

    Description A product with high resistance to non-oxidizing acids and chloride-containing media due to higher molybdenum content. Supra 316/4436 has good formability and weldability.

    EN 1.4436

    ASTM type 316

    ASTM UNS S31600

    Microstructure Austenitic

    Typical applications

    • Pulp and paper industry equipment
    • Pharmaceutical industry equipment
    • Flanges and valves

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C 0.04

    Cr 16.9

    Ni 10.7

    Mo 2.6

    N -

    Others -

    Supra 316/4432

    Description Supra 316L/4432 is a low-carbon alternative to Supra 316/4436. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion.

    EN 1.4432

    ASTM type 316L

    ASTM UNS S31603

    Microstructure Austenitic

    Typical applications

    •  Drinking water systems
    •  Cooling systems
    •  Wastewater systems
    •  Flanges and valves

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C 0.02

    Cr 16.9

    Ni 10.7

    Mo 2.6

    N -

    Others -

    Supra 316L/4435

    Description A Supra 316L/4435 alternative with higher chromium and nickel content for enhanced corrosion resistance and formability.

    EN 1.4435

    ASTM type 316L

    ASTM UNS S31603

    Microstructure Austenitic

    Typical applications

    • Urea plants
    • Pulp and synthetic fiber plants
    • Flanges and valves

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C

    0.02

     

    Cr 17.3

    Ni 12.6

    Mo 2.6

    N -

    Others -

    Supra 316Ti/4571

    Description 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.

    EN 1.4571

    ASTM type 316Ti

    ASTM UNS S31635

    Microstructure Austenitic

    Usage

    • Flue gas applications
    • Flanges and valves

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C 0.04

    Cr 16.8

    Ni 10.9

    Mo 2.1

    N -

    Others Ti

    Supra 444/4521

    Description A nickel-free molybdenum-alloyed ferritic stainless steel with very good corrosion resistance, good cold formability and high strength. Supra 444/4521 allows for thinner walls in tanks and is not prone to stress corrosion cracking.

    EN 1.4521

    ASTM type 444

    ASTM UNS S444000

    Microstructure Ferritic

    Typical applications

    • Hot water tanks
    • Drinking water pipes

    Datasheet Download Supra range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.

    Chemical composition

    C 0.02

    Cr 18.0

    Ni -

    Mo 20

    N -

    Others Nb,Ti

    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

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