Forta

Duplex and other high strength stainless steel

Browse Forta range specifications Visit Stainless Steel Finder

The Forta range contains the following: Duplex, H-series and temper rolled austenitic and ferritic products. These high strength stainless steels enable thinner structures and weight reduction.

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Forta range

The Forta range contains the following; Duplex, H-series austenitic and temper rolled products. 
The Duplex products are suitable for high strength, corrosion resistance, and enhanced resistance to stress corrosion cracking. The H-series austenitic products are suitable for high strength and high ductility. Lastly, the temper rolled products are suitable for high strength and high hardness. 

The Forta range products are appropriate for a variety of applications. Our Duplex products are excellent for pressure piping systems, pressure vessels, storage tanks and structural components to name a few. The weldability of duplex steels is good provided the suggested welding procedures are followed. 

Our H-series products are suitable for automotive applications including structural safety parts chassis parts and complex-forming parts. In addition, railroad cars, trucks, buses as well as flanges and valves are also appropriate application purposes.

Unlike carbon steels, Forta range duplex products with their superior corrosion resistance do not need to be coated making them a more cost-effective long-term choice. Since duplex products are also high strength, thinner gauges can potentially be used which saves on material costs. The thermal expansion of duplex is similar to carbon 
steels making it possible to combine the two in one and the same application. 

 

Outokumpu Forta Edelstahlgüten

Forta DX 2205

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 -

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Forta LDX 2101

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

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Forta DX 2304

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

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Forta EDX 2304

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

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Forta LDX 2404

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

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Forta SDX 100

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

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Forta SDX 2507

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 -

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Forta FDX 27

A duplex product with improved formability and better corrosion resistance than Forta LDX 2101 and Forta DX 2304. 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

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 19.0-22.0

Ni 2.0-4.0

Mo 0.6-1.4

N 0.14-0.24

Others ≤2.5Mn

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Forta 4589

A 14% chromium product with a small amount of niobium for elevated strength, making it suitable for structural parts exposed to loads that demand higher yield points.

EN 1.4589

ASTM type -

ASTM UNS S42035

Microstructure Ferritic

Typical applications

  • Conveyor chains 
  • Railroad cars

Product forms

Datasheet

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

Chemical composition

C 0.05

Cr 14.0

Ni 1.7

Mo 0.3

N -

Others

Ti

 

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Forta H400

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

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 17.5

Ni 4.0

Mo -

N 0.20

Others 6.8Mn

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Forta 430/4016

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 -

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Forta 301LN/4318

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 -

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Forta 301/4310

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 -

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Forta 304/4301

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

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 18.1

Ni 8.1

Mo -

N -

Others -

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Forta 304L/4307

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 -

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Forta 316/4401

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 -

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Forta 316L/4404

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 -

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Forta 316plus

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 -

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Forta 316Ti/4571

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

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Go directly to Outokumpu Forta Edelstahlgüten

Standards und Zulassungen für die Kategorie Forta

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)

Cases

Alle anzeigen

Case wastewater treatment tanks

Outokumpu Forta enabled innovative wastewater treatment tanks

Case new generation tank building

Straight on the spot

Case Husarviken bridge

Futuristic functionality

Case Pedestrian Bridge at TRUMPF Headquarters

Footbridge safely connects TRUMPF employees

Case Södertälje bridge

Designed to last

Case Kiruna Wagon

Innovative solution for uncommon cold

Case Sheikh Jaber Al-Ahmad Al-Sabah causeway

A span of uncommon strength

Case Acideka tanks

Keeping the lid on corrosion

Case Valmet flue-gas cleaning units

Stainless solution for greener ships

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