The Core range contains austenitic and ferritic stainless steel products for mild to medium corrosive environments. The classic 18/8 stainless steel is part of Outokumpu Core range.
Outokumpu Core range
stainless steelS for corrosive environments
Key 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.
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.
Outokumpu Core range
Austenitic and ferritic stainless steels for mild to medium corrosive environments
We believe in world that lasts forever
Why Core range
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 Core stainless steel grades
Core 304/4301
Description 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.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 18.1
Ni 8.1
Mo -
N -
Others -
Core 304L/4307
Description 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.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition,% by mass
C 0.02
Cr 18.1
Ni 8.1
Mo -
N -
Others -
Core 304LN/4311
Description 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.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 18.5
Ni 9.2
Mo -
N 0.14
Others -
Core 304L/4306
Description A higher nickel alternative to Core 304L/4307 with improved formability and deep drawability.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 18.2
Ni 10.1
Mo -
N -
Others -
Core 305/4303
Description 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.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 17.7
Ni 12.5
Mo -
N -
Others -
Core 321/4541
Description A titanium-stabilized austenitic stainless steel with improved intergranular corrosion resistance for an extended temperature range.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composotion, % by mass
C 0.04
Cr 17.3
Ni 9.1
Mo -
N -
Others Ti
Core 347/4550
Description 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.
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
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.05
Cr 17.5
Ni
9.5
Mo -
N -
Others Nb
Core 301LN/4318
Description A low-carbon, nitrogen alloyed alternative to Core 301/4310 with elevated strength, making it particularly suitable for lightweight construction.
EN 1.4318
ASTM type 301LN
ASTM UNS S30153
Microstructure Austenitic
Typical applications
• Automotive applications, especially vehicles chassis
• Railroad cars
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 17.7
Ni 6.5
Mo -
N 0.14
Others -
Core 301/4310
Description 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
EN 1.4310
ASTM type 301
ASTM UNS S30100
Microstructure Austenitic
Typical applications
- Springs
- Press plates
- Conveyor chains
- Mixer blades
- Sinks
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, by mass %
C 0.10
Cr 17.0
Ni 7.0
Mo -
N -
Others -
Core 201/4372
Description This low-nickel stainless steel has properties approaching Core 301/4310 but with a higher work hardening coefficient. Grade is available from Outokumpu Americas.
EN 1.4372
ASTM type 201
ASTM UNS S20100
Microstructure Austenitic
Typical applications
- Household appliances
- Kitchen utensils
- Sinks
- Doors and windows
- Railroad cars
Product forms
Datasheet Download Core range datasheet
Typical chemical composition, % by mass
C 0.05
Cr 16.1
Ni 3.6
Mo -
N 0.08
Others 7Mn
Core 201LN/4372
Description 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.
EN 1.4372
ASTM type 201LN
ASTM UNS S20153
Microstructure Austenitic
Typical applications
- Railroad freight cars
- Truck trailers
- Coal handling
- Bulk transport equipment
Product forms
Datasheet Download Outokumpu_Core_datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
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
Description 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.
EN
1.4509
ASTM type -
ASTM UNS S43940
Microstructure Ferritic
Usage
- Indoor claddings
- Restaurant equipment and appliances
- Tubes
- Heat exchangers
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 17.6
Ni -
Mo -
N
-
Others Nb, Ti
Core 4622
Description 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.
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
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 21.0
Ni -
Mo -
N -
Others Nb,Ti,Cu
Core 434/4113
Description A molybdenum-alloyed ferritic stainless steel that offers improved corrosion resistance. This grade is available from Outokumpu Americas.
EN 1.4113
ASTM type 434
ASTM UNS S43400
Microstructure Ferritic
Typical applications
- Automotive trim and fittings
Product forms
Datasheet Download Core range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 16.5
Ni -
Mo 1.0
N -
Others -
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 steels
The most commonly used international product standards are given here. For a list of standards by product, see steelfinder.outokumpu.com
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)
