Acciaio inox per ambienti corrosivi

Core

La nostra gamma Core include prodotti in acciaio inox austenitico e ferritico per ambienti mediamente corrosivi. La gamma è adatta per un'ampia varietà di applicazioni per cui è richiesta una buona formabilità e saldabilità.

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Outokumpu Core grades

Core 304/4301

Core 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. It’s an all-purpose product with good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Core 304/4301 can be delivered with a variety of surface finishes.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4301
  • ASTM type: 304
  • ASTM UNS: S30400
  • Microstructure: Austenitic
Typical applications
  • Household appliances and consumer goods
  • Kitchen equipment
  • Indoor and outdoor cladding, handrails and window frames
  • Food and beverage industry equipment
  • Storage tanks
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.04
  • Cr: 18.1
  • Ni: 8.1
  • Mo: -
  • N: -
  • Others: -

Core 304L/4307

Core 304L/4307 is a low-carbon alternative to Core 304/4301. The lower carbon content minimizes carbide precipitation as a result of heat input, for example during welding, giving improved resistance against intergranular corrosion. Core 304L/4307 is suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4307
  • ASTM type: 304L
  • ASTM UNS: S30403
  • Microstructure: Austenitic
Typical applications
  • Food and beverage industry equipment
  • Chemical and pharmaceutical industry equipment (mild to medium corrosive environments)
  • Heat exchangers
  • Storage tanks
  • Tank containers
  • Pipes and tubes
  • Flanges and valves
Typical chemical composition,% by mass
  • C: 0.02
  • Cr: 18.1
  • Ni: 8.1
  • Mo: -
  • N: -
  • Others: -

Core 304LN/4311

A low-carbon, higher nickel and nitrogen alloyed alternative to Core 304L/4307 with improved strength and low-temperature toughness. Suitable for applications that require high tensile strength.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4311
  • ASTM type: 304L
  • ASTM UNS: S30453
  • Microstructure: Austenitic
Typical applications
  • Railroad cars
  • Pressure vessels
  • Chemical plant equipment (mild to medium corrosive environments)
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 18.5
  • Ni: 9.2
  • Mo: -
  • N: 0.14
  • Others: -

Core 304L/4306

A higher nickel alternative to Core 304L/4307 with improved formability and deep drawability.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4306
  • ASTM type: 304L
  • ASTM UNS: S30403
  • Microstructure: Austenitic
Typical applications
  • Chemical and pharmaceutical plant equipment (mild to medium corrosive environments)
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 18.2
  • Ni: 10.1
  • Mo: -
  • N: -
  • Others: -

Core 305/4303

A high-nickel alternative to Core 304/4301 with reduced strain hardening and excellent cold-forming properties. Ideal for parts that require high degree of deformation. 

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4303
  • ASTM type: 305
  • ASTM UNS: S30500
  • Microstructure: Austenitic
Typical applications
  • Industrial parts with complex shapes
  • Sinks and other deep-drawn products
  • Complex stamping processes
  • Re-rollers producing very thin-gauge coils
Typical chemical composition, % by mass
  • C: 0.04
  • Cr: 17.7
  • Ni: 12.5
  • Mo: -
  • N: -
  • Others: -

Core 321/4541

A titanium-stabilized austenitic stainless steel with improved intergranular corrosion resistance for an extended temperature range.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4541
  • ASTM type: 321
  • ASTM UNS: S32100
  • Microstructure: Austenitic
Typical applications
  • Anneailing covers
  • Stack liners
  • Automotive exhaust systems
  • Welded pressure vessels
  • Flanges and valves
Typical chemical composotion, % by mass
  • C: 0.04
  • Cr: 17.3
  • Ni: 9.1
  • Mo: -
  • N: -
  • Others : Ti

Core 347/4550

Core 347/4550 is a niobium stabilized alternative to Core 321/4541 with improved intergranular corrosion resistance and good mechanical properties at high temperatures. Core 347/4550 is particularly useful in applications with intermittent heating in the range 400–900 °C/750–1650 °F.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4550
  • ASTM type: 347
  • ASTM UNS: S34700
  • Microstructure: Austenitic
Typical applications
  • High temperature gaskets
  • Rocket engine parts
  • Expansion joints
  • Aircraft collector rings
  • Exhaust manifolds
  • Chemical production equipment
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.05
  • Cr: 17.5
  • Ni: 9.5
  • Mo: -
  • N: -
  • Others: Nb

Core 301LN/4318

A low-carbon, nitrogen alloyed alternative to Core 301/4310 with elevated strength, making it particularly suitable for lightweight construction.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4318
  • ASTM type: 301LN
  • ASTM UNS: S30153
  • Microstructure: Austenitic
Typical applications

• Automotive applications, especially vehicles chassis
• Railroad cars

Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 17.7
  • Ni: 6.5
  • Mo: -
  • N: 0.14
  • Others : -

Core 301/4310

A lower chromium and nickel alternative to Core 304/4301 with high work hardening capacity, this is a good choice for applications subjected to high mechanical loading

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4310
  • ASTM type: 301
  • ASTM UNS: S30100
  • Microstructure: Austenitic
Typical applications
  • Springs
  • Press plates
  • Conveyor chains
  • Mixer blades
  • Sinks
Typical chemical composition, by mass %
  • C: 0.10
  • Cr: 17.0
  • Ni: 7.0
  • Mo: -
  • N: -
  • Others : -

Core 201/4372

This low-nickel stainless steel has properties approaching Core 301/4310 but with a higher work hardening coefficient. Grade is available from Outokumpu Americas.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4372
  • ASTM type: 201
  • ASTM UNS: S20100
  • Microstructure: Austenitic
Typical applications
  • Household appliances
  • Kitchen utensils
  • Sinks
  • Doors and windows
  • Railroad cars
Typical chemical composition, % by mass
  • C: 0.05
  • Cr: 16.1
  • Ni: 3.6
  • Mo: -
  • N: 0.08
  • Others: 7Mn

Core 201LN/4372

This low-nickel stainless steel also has properties approaching Core 301/4310, but has a higher strength than Core 201/4372. It hardens more quickly due to its higher work hardening coefficient. Grade is available from Outokumpu Americas.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4372
  • ASTM type: 201LN
  • ASTM UNS: S20153
  • Microstructure: Austenitic
Typical applications
  • Railroad freight cars
  • Truck trailers
  • Coal handling
  • Bulk transport equipment
Typical chemical composition, % by mass
  • C: 0.03
  • Cr: 16.2
  • Ni: 4.0
  • Mo: -
  • N: 0.20
  • Others: Cu, 6.5Mn

Core 441/4509

A nickel-free 17% chromium ferritic stainless steel grade with good corrosion resistance and high-temperature strength was originally designed for exhaust systems. Core 441/4509 is available with single (niobium) or dual (niobium and titanium) stabilization. Due to good formability and weldability it is often a suitable replacement for Core 301/4310.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4509
  • ASTM type: -
  • ASTM UNS: S43940
  • Microstructure: Ferritic
Usage
  • Indoor claddings
  • Restaurant equipment and appliances
  • Tubes
  • Heat exchangers
Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 17.6
  • Ni: -
  • Mo: -
  • N:

    -

     

  • Others: Nb, Ti 

Core 4622

A nickel-free, high-chromium (21Cr) ferritic stainless steel with equal corrosion resistance to Core 304/4301. Core 4622 has excellent deep drawability and is almost ridging free, meaning it is easier to polish and has a lower overall production cost.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4622
  • ASTM type: -
  • ASTM UNS: S44330
  • Microstructure: Ferritic
Typical applications
  • Household, catering and architectural applications (indoor and outdoor)
  • Tubular products for automotive and process industries
  • Building facades
  • Tanks and process equipment
Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 21.0
  • Ni: -
  • Mo: -
  • N: -
  • Others: Nb,Ti,Cu

Core 434/4113

A molybdenum-alloyed ferritic stainless steel that offers improved corrosion resistance. This grade is available from Outokumpu Americas.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4113
  • ASTM type: 434
  • ASTM UNS: S43400
  • Microstructure: Ferritic
Typical applications
  • Automotive trim and fittings
Typical chemical composition, % by mass
  • C: 0.04
  • Cr: 16.5
  • Ni: -
  • Mo: 1.0
  • N: -
  • Others: -

Circle Green Core 304/4301

Circle Green Core 304/4301 is a classic 18% chromium, 8% nickel austenitic stainless steel. It’s an all-purpose product with good corrosion resistance and is suitable for a wide variety of applications that require good formability and weldability. Circle Green Core 304/4301 can be delivered with a variety of surface finishes.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4301
  • ASTM type: 304
  • ASTM UNS: S30400
  • Microstructure: Austenitic
Typical applications
  • Household appliances and consumer goods
  • Kitchen equipment
  • Indoor and outdoor cladding, handrails and window frames
  • Food and beverage industry equipment
  • Storage tanks
  • Flanges and valves
Typical chemical composition, % by mass
  • C: 0.04
  • Cr: 18.1
  • Ni: 8.1
  • Mo: -
  • N: -
  • Others: -

Circle Green Core 304L/4307

Circle Green Core 304L/4307 is a low-carbon alternative to Core 304/4301. 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 Core 304L/4307 is suitable for a wide variety of applications that require good formability and weldability, and can be delivered with a variety of surface finishes.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4307
  • ASTM type: 304L
  • ASTM UNS: S30403
  • Microstructure: Austenitic
Typical applications
  • Food and beverage industry equipment
  • Chemical and pharmaceutical industry equipment (mild to medium corrosive environments)
  • Heat exchangers
  • Storage tanks
  • Tank containers
  • Pipes and tubes
  • Flanges and valves
Typical chemical composition,% by mass
  • C: 0.02
  • Cr: 18.1
  • Ni: 8.1
  • Mo: -
  • N: -
  • Others: -

Circle Green Core 441/4509

A nickel-free 17% chromium ferritic stainless steel grade with good corrosion resistance and high-temperature strength was originally designed for exhaust systems. Circle Green Core 441/4509 is available with single (niobium) or dual (niobium and titanium) stabilization. Due to good formability and weldability it is often a suitable replacement for Core 301/4310.

Per aggiungere un altro elemento, devi prima escludere questo dal confronto

  • EN: 1.4509
  • ASTM type: -
  • ASTM UNS: S43940
  • Microstructure: Ferritic
Usage
  • Indoor claddings
  • Restaurant equipment and appliances
  • Tubes
  • Heat exchangers
Typical chemical composition, % by mass
  • C: 0.02
  • Cr: 17.6
  • Ni: -
  • Mo: -
  • N:

    -

     

  • Others: Nb, Ti 

Consulta le qualità di acciaio in Steel Finder

Steel Finder

Core

La gamma Core include gradi di acciai inossidabili austenitici e ferritici per ambienti da moderatamente a mediamente corrosivi con un valore PRE compreso tra 17 – e 22. 

Il grado di acciaio inossidabile austenitico più utilizzato, Core 304L/4307 (EN 1.4307), definisce il panorama complessivo della gamma Core. Tale gamma è completata dai moderni acciai inossidabili ferritici stabilizzati al 18 – 21% di cromo privi di nichel, come Core 441/4509 (EN 1.4509), e alternative austenitiche a basso tenore di nichel.

L'ultima novità della gamma Core è l'acciaio inossidabile ferritico stabilizzato al 21% di cromo, Core 4622 (EN 1.4622). Il Core 4622 senza nichel offre resistenza alla corrosione e saldabilità simili e miglior trasferimento di calore, lavorabilità e trafilabilità profonda rispetto al 304L.

Gli acciai inossidabili austenitici Cr-Ni della gamma Core hanno buone capacità di resistenza alla corrosione, saldatura e formatura, e 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. 

I moderni acciai inossidabili ferritici stabilizzati della gamma Core possiedono buone proprietà di saldatura e imbutitura e resistenza alla corrosione. Grazie alla struttura frazionata, 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 Core 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.

Standards and approvals for Core 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 10095  Heat resisting steels and nickel alloys 
EN 10151  Stainless steel strip for springs 
EN 10217-7  Welded steel tubes for pressure purposes – Stainless steel tubes 
EN 10296-2  Welded circular steel tubes for mechanical and general engineering purposes – Stainless Steel tubes 
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 A182/ ASME SA-182  Stainless steel and heat resisting steel bars and shapes 
ASTM A 240  Cr and Cr-Ni stainless steel plate, sheet and strip for pressure vessels 
ASTM A276  Stainless steel and heat-resisting steel rod and wire for cold heading and forging 
ASTM A479/ ASME SA-479  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 
Eurocode 3 / EN 1993-1-4  Design of steel structures – Part 1-4: General rules – Supplementary rules for stainless steel 

Outokumpu meets the most common certifications and approvals, including:

  • AD 2000 Merkblatt
  • Approval of Material Manufacturers
  • Factory Production Control Certificate
  • ISO 9001
  • ISO 14001
  • ISO 50001
  • ISO/TS 16949
  • NORSOK
  • OHSAS 18001
  • Pressure Equipment Directive (PED)

Downloads

Outokumpu Core range datasheet
Outokumpu 4622 and 316plus brochure
Machining guidelines for standard austenitic stainless steel grades
Outokumpu Product Ranges chart