Supra

Acciaio inox per ambienti altamente corrosivi

Sfoglia le specifiche della gamma Supra. Visit Stainless Steel Finder

La gamma Supra include prodotti in acciaio inox progettati per ambienti altamente corrosivi. Gli acciai inossidabili della nostra gamma Supra hanno una buona resistenza alla corrosione uniforme a molte sostanze chimiche organiche e inorganiche.

Acciai inossidabili per ambienti altamente corrosivi

I prodotti Supra 316/4401 e Supra 316L/4404 sono utilizzati nella maggior parte delle aree di applicazione e sono ampiamente disponibili in tutto il mondo. I prodotti della gamma Supra hanno un'eccellente resistenza alla corrosione e sono adatti per un'ampia gamma di applicazioni.

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Supra

La gamma Supra include gradi di acciai inossidabili austenitici e ferritici per ambienti da mediamente ad altamente corrosivi con un valore PRE compreso tra 22 – 26.

Il grado di acciaio inossidabile legato al molibdeno più utilizzato, Supra 316L/4404 (EN 1.4404), definisce il panorama complessivo della gamma Supra, che è completata da una moderna alternativa di acciaio inossidabile ferritico al 18% di cromo legato al molibdeno stabilizzato e privo di nickel, Supra 444/4521 (EN 1.4521).

L'ultima novità della gamma Supra è l'austenitico Supra 316plus/4420 (EN 1.4420). Grazie alla maggiore quantità di cromo e azoto, Supra 316plus ha una maggiore resistenza alla corrosione e robustezza rispetto a 316L. 

Gli acciai inossidabili austenitici Cr-Ni della gamma Supra hanno eccellenti capacità di resistenza alla corrosione, saldatura e formatura, in particolare presentano caratteristiche di formatura per stiramento. Gli acciai austenitici vantano una duttilità molto elevata anche a temperature criogeniche. A causa della maggiore durezza e dell'incrudimento naturali degli acciai inossidabili austenitici, può essere necessaria un'attenzione particolare durante le operazioni di formatura e lavorazione rispetto agli acciai inossidabili ferritici o al carbonio.

Il moderno acciaio inossidabile ferritico legato al molibdeno stabilizzato della gamma Supra, Supra 444/4521, ha eccellenti proprietà di saldatura, imbutitura e resistenza alla corrosione. Gli acciai inossidabili ferritici privi di nichel hanno un'eccellente resistenza alla tensocorrosione indotta da cloruri. I ferritici hanno buone proprietà di trasferimento del calore che possono essere sfruttate in applicazioni in cui si predilige un trasferimento di calore uniforme e rapido. Un buon trasferimento di calore con una minore espansione termica facilita la saldabilità grazie alla minore distorsione della saldatura e al comportamento meno instabile rispetto agli austenitici. Inoltre, i ferritici hanno una lavorabilità simile a quella degli acciai al carbonio, a causa della bassa tendenza all'incrudimento.  

I gradi della gamma Supra possono essere utilizzati in un ampio ventaglio di applicazioni, con il supporto di una vasta selezione di finiture superficiali fornito da stabilimenti e Centri servizi.

Vedi di seguito l'elenco completo dei gradi Supra

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.

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 -

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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.

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 -

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Supra 316LN/4406 stainless steel

316L suitable for low temperatures

EN 1.4406

ASTM type 316LN

ASTM UNS S31653

Microstructure Austenitic

Typical applications

  • Cryogenic tank

Chemical composition

C

0.02

 

Cr 17.3

Ni 12.6

Mo 2.6

N -

Others -

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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

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 -

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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.

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 -

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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.

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 -

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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.

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 -

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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.

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

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Supra 4429 stainless steel

A special 316L with increased content of Nitrogen and Molybdenum

EN 1.4429

ASTM type 316LN

ASTM UNS S31653

Microstructure Austenitic

Typical applications

  • Pharmaceutical
  • Chemical
  • Petrochemical
  • Cryogenic
  • Cellulose
  • Food processing industries

Chemical composition

C 0.02

Cr 18.0

Ni -

Mo 20

N -

Others Nb,Ti

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Supra 724L stainless steel

A modified version of 4435 for Urea applications

EN 1.4435

ASTM type 316L

ASTM UNS S31603

Microstructure Austenitic

Typical applications

  • Urea reactors

Chemical composition

C 0.02

Cr 17.3

Ni 12.6

Mo 2.6

N -

Others -

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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.

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

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Go directly to Outokumpu Supra grades

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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