Outokumpu Forta range
DUPLEX AND OTHER HIGH STRENGTH STAINLESS STEELS
Key grades
Duplex
Duplex products for high strength, corrosion resistance, and enhanced resistance to stress corrosion cracking
H-series
Austenitic stainless steel for high strength and high ductility
Temper rolled
Austenitic and ferritic products for high strength and high hardness
We believe in the world that lasts forever
Why Forta range
- Unlike carbon steels, Forta range duplex products do not need to be painted or coated, making them a more cost effective long-term choice.
- Because duplex products are also high strength, thinner gauges can potentially be used, which saves on material costs.
- Forta is home of Outokumpu's latest duplex innovation: formable duplex grade Forta FDX 27.
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 Forta stainless steel grades
Forta DX 2205
Description
The most popular duplex product on the market. Offers very good resistance to uniform and localized corrosion and stress corrosion cracking in combination with high mechanical strength.
EN 1.4462
ASTM type -
ASTM UNS S32205
Microstructure Duplex
Typical applications
- Cargo tanks in chemical tankers
- Pulp and paper industry applications such as digesters and process tanks
- Oil and gas industry applications such as flanges, tubes, and pipes
- Structural components in bridges
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication.
Chemical composition, % by mass
C 0.02
Cr 22.4
Ni 5.7
Mo 3.1
N 0.17
Others -
Forta LDX 2101
Description
A lean-alloyed duplex product with good resistance to localized and uniform corrosion, as well as stress corrosion cracking, making it a good substitute for coated carbon steel in e.g. structural components and storage tanks. Also offers high mechanical strength and good machinability.
EN 1.4162
ASTM type -
ASTM UNS S32101
Microstructure Duplex
Typical applications
- Storage tanks
- Household heaters
- Structural components for floodgates and bridges, or rebar for concrete structures
- Pulp and paper industry applications such as digesters and components for paper machines
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication.
Chemical composition, % by mass
C 0.03
Cr 21.5
Ni 1.5
Mo 0.3
N 0.22
Others 5 Mn Cu
Forta DX 2304
Description
A duplex product with a leaner alloying composition than Forta DX 2205. It has good resistance to localized and uniform corrosion, as well as stress corrosion cracking, combined with high mechanical strength.
EN 1.4362
ASTM type -
ASTM UNS S32304
Microstructure Duplex
Typical applications
- Pulp and paper industry applications
- Blast walls on oil platforms
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication.
Chemical composition, % by mass
C 0.02
Cr 23.0
Ni 4.8
Mo 0.3
N 0.10
Others Cu
Forta EDX 2304
Description
An enhanced version of Forta DX 2304 with better corrosion resistance and higher mechanical strength.
EN 1.4362
ASTM type -
ASTM UNS S32304
Microstructure Duplex
Typical applications
- Offshore topside structural components
- Tank applications
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C
0.02
Cr 23.8
Ni 4.3
Mo 0.5
N 0.18
Others Cu
Forta LDX 2404
Description
A low-nickel, high-nitrogen duplex product with higher mechanical strength than Forta DX 2205. Offers very good resistance to localized and uniform corrosion, as well as stress corrosion cracking.
EN 1.4662
ASTM type -
ASTM UNS S82441
Microstructure Duplex
Typical applications
- Storage tanks
- Structural components for flood and sluice gates
- Mining industry applications such as dewatering equipment
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 24.0
Ni 3.6
Mo 1.6
N 0.27
Others 3Mn Cu
Forta SDX 100
Description
A super duplex product with higher corrosion resistance and mechanical strength than Forta DX 2205. Often used in extremely corrosive environments such as desalination, chemical, or offshore subsea applications.
EN 1.4501
ASTM type -
ASTM UNS S32760
Microstructure Duplex
Typical applications
- Desalination plants
- Industrial piping
- Scrubbers
- Tubular products for oil and gas applications
- Deep-sea pipelines
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet
Chemical composition
C 0.02
Cr 25.4
Ni 6.9
Mo 3.8
N 0.27
Others W Cu
Forta SDX 2507
Description
A super duplex product with higher corrosion resistance and mechanical strength than Forta DX 2205. Often used in extremely corrosive environments such as desalination, chemical, or offshore subsea applications.
EN 1.4410
ASTM type -
ASTM UNS S32750
Microstructure Duplex
Typical applications
- Desalination plants
- Industrial piping
- Scrubbers
- Tubular products for oil and gas applications
- Deep-sea pipelines
- Flanges and valves
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 25
Ni 7.0
Mo 4.0
N 0.27
Others -
Forta FDX 27
Description
A duplex product with improved formability and better corrosion resistance than Forta FDX 25. It has high strength and excellent forming properties, and is used in applications where the use of standard duplex is restricted due to its formability limitations.
EN
1.4637
ASTM type -
ASTM UNS S82031
Microstructure Duplex
Typical applications
- Plate heat exchangers
- Deep drawing applications for corrosive environments
- Pump components
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C
≤0.04
Cr 19.0-22.0
Ni 2.0-4.0
Mo 0.6-1.4
N 0.14-0.24
Others ≤2.5Mn
Forta H400
Description
Forta H400 has higher strength than standard 304/4301 and a lower nickel content, making it a cost-effective and lightweight austenitic product for the automotive industry. It has been used in automotive applications for over 10 years.
EN
1.4376
ASTM type -
ASTM UNS -
Microstructure Austenitic
Usage
- Cross members
- Strut domes
- Bumpers
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 17.5
Ni 4.0
Mo -
N 0.20
Others 6.8Mn
Forta 430/4016
Description
A classic 16% chromium ferritic stainless steel used in mildly corrosive environments.
EN 1.4016
ASTM type 430
ASTM UNS S43000
Microstructure Ferritic
Typical applications
- Automotive components
- Structural applications
- Tanks
Product forms
Datasheet Download Forta range datasheet
Typical chemical composition, % by mass
C 0.05
Cr 16.2
Ni -
Mo -
N -
Others -
Forta 301LN/4318
Description
A low-carbon, nitrogen alloyed alternative to Forta 301/4310.
EN 1.4318
ASTM type 301LN
ASTM UNS S30153
Microstructure Austenitic
Typical applications
- Vehicle chassis
- Profiles
Product forms
Datasheet Download Forta 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 -
Forta 301/4310
Description
A lower chromium and nickel alternative to Forta 304/4301 with high work hardening capacity.
EN
1.4310
ASTM type 301
ASTM UNS S30100
Microstructure Austenitic
Typical applications
- Automotive components
- Cable connectors
- Springs
- Window frames
- Commercial appliances
Product forms
Datasheet Download Forta 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 -
Forta 304/4301
Description
Forta 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.
EN 1.4301
ASTM type 304
ASTM UNS S30400
Microstructure Austenitic
Typical applications
- Beer kegs
- Cutlery
- Automotive components
- Tanks and vessels
- Furniture
- Structural applications
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 18.1
Ni 8.1
Mo -
N -
Others -
Forta 304L/4307
Description
Forta 304L/4307 is a low-carbon alternative to Forta 304/4301 and is suitable for a wide variety of applications.
EN 1.4307
ASTM type 304L
ASTM UNS S30403
Microstructure Austenitic
Typical applications
- Beer kegs
- Cutlery
- Automotive components
- Tanks and vessels
- Furniture
- Structural applications
Product forms
Datasheet Download Forta 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 -
Forta 316/4401
Description
A normal-carbon alternative to Forta 316L/4404 that is widely used for various applications.
EN 1.4401
ASTM type 316
ASTM UNS S31600
Microstructure Austenitic
Typical applications
- Automotive components
- Tanks and vessels
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 17.2
Ni 10.1
Mo 2.1
N -
Others -
Forta 316L/4404
Description
A normal-carbon alternative to Forta 316L/4404 that is widely used for various applications.
EN 1.4404
ASTM type 316L
ASTM UNS S31603
Microstructure Austenitic
Typical applications
- Automotive components
- Tanks and vessels
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechnanical properties, physical properties and fabrication
Typical chemical composition, % by mass
C 0.02
Cr 17.2
Ni 10.1
Mo 2.1
N -
Others -
Forta 316plus
Description
Forta 316plus is a cost-efficient, 21Cr lower-nickel/molybdenum alternative to traditional molybdenum austenitics like Forta 316L/4404.
EN 1.4420
ASTM type -
ASTM UNS S31655
Microstructure Austenitic
Typical applications
- Automotive components
- Tanks and vessels
Product forms
Data sheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.02
Cr 20.3
Ni 8.6
Mo 0.7
N 0.19
Others -
Forta 316Ti/4571
Description
A titanium-stabilized, molybdenum-alloyed austenitic alternative to Forta 316L/4404 – mainly used in Germany.
EN 1.4571
ASTM type 316Ti
ASTM UNS S32100
Microstructure Austenitic
Typical applications
- Heating technology
- Profiles
Product forms
Datasheet Download Forta range datasheet for more information on corrosion resistance, mechanical properties, physical properties and fabrication.
Typical chemical composition, % by mass
C 0.04
Cr 16.8
Ni 10.9
Mo 2.1
N -
Others Ti
Standards and approvals for Forta 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 |
Forta DX 2304, Forta DX 2205, and Forta SDX 2507 are listed in EN 10028-7:2007.
European material approval EAM 0045-01:2012/01 for Forta LDX 2101 is available for cold rolled 0.5-6.4 mm and hot rolled 3.0–10.0 mm.
In ASME II-D 2013, Forta DX 2205 (S31803 and S32205). Forta EDX 2304 (S32304), Forta SDX 100 (S32760) and Forta SDX 2507 (S32750) are listed for general use in the temperature range -30 – 316 °C. Data for Forta LDX 2101 and Forta LDX 2404 can be found in ASME code case 2418-1 and 2780 respectively.
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
- Pressure Equipment Directive (PED)
