Products
Product pages available in
EN - DE - FR - ES
Sustainability
News, events and stories
Hot-rolled ferrite-bainite steels
Description
This range of hot-rolled high-strength steels has been developed to meet weight -reduction requirements. This family of steels extends the HSLA range of micro-alloyed steels to include products combining high tensile strength (UTS) with excellent aptitude for forming and stamping (stretch-flangeability) based on their ferritic-bainitic microstructure.
Applications
These steels are cold-drawn.
The main applications are:
- Structural parts (longitudinal beams, crossmemembers, body and running-gear components)
- Wheels
- Mechanical parts (running-gear components, transmissions, etc.)
ArcelorMittal has an extensive database relating to the forming and service properties of the entire range of ferritic-bainitic steels. A team of experts is available to carry out specific studies based on modelling or laboratory tests to incorporate these steels at the design stage.
-
Front and rear underseat crossmember in HR460560T-FB-GI Extragal® (thickness: 1.8 mm)
-
Suspension arm in HR400Y540T-FB-UNC (thickness: 4 mm)
-
Suspension arm in Extragal® HR460560T-FB-GI (thickness: 4 mm)
-
Pillar reinforcement in galvanised HR460560T-FB-GI Extragal®(thickness: 1.8 mm)
-
Wheel in HR440Y580T-FB
Designation and standard
| Show all |
|
|
|
|
|
|---|---|---|---|---|---|
| ArcelorMittal name | Generic name | Euronorms | VDA 239-100 | JFS | ABNT NBR |
| HR300Y450T-FB | FB450 | HDT450F (+Z) | HR300Y450T-FB (-UNC,-GI) | JSH440W | FB450 |
| HR440Y580T-FB | FB580/FB590 | HDT580F(+Z) | HR440Y580T-FB (-UNC,-GI) | JSH590R | FB580 |
| HR480Y590T-FB-HHE | FB590HHE | HDT580F | HR440Y580T-FB (-UNC) | JSH590R |
-
Euronorms
Uncoated (EN 10338: 2015): Steel grade name
Electrogalvanized (EN 10338: 2015 + EN 10152 :2017): Steel grade name+ZE
Galvannealed (EN 10346: 2015): Steel grade name+ZF
Extragal® (EN 10346: 2015): Steel grade name+Z -
VDA 239-100
Uncoated: Steel grade name-UNC
Electrogalvanised: Steel grade name-EG
Galvannealed: Steel grade name-GA
Extragal®: Steel grade name-GI
Mechanical properties
| Show all |
|
|
|
|
|
|
|
|
|
|---|---|---|---|---|---|---|---|---|---|
| ArcelorMittal name | Generic name | Direction | Yield stress Rp0.2 (MPa) | Tensile strength Rm (MPa) | Min. A(%) | Type 1 Min. A50mm (%) | Type 2 Min. A80mm (%) | Type 3 Min. A50mm (%) | Min. BH2 MPa |
| HR300Y450T-FB | FB450 | RD | 300 - 400 | 450 - 550 | 27 | 25 | 24 | 26 | 30 |
| HR400Y540T-FB | FB540 | RD | 400 - 490 | 540 - 610 | 25 | 18 | 18 | 19 | 30 |
| HR460Y560T-FB | FB560 | RD | 460 - 530 | 560 - 640 | 22 | 17 | 17 | 18 | 30 |
| HR440Y580T-FB | FB580/FB590 | RD | 440 - 600 | 580 - 700 | 17 | 16 | 15 | 16 | 30 |
| HR480Y590T-FB-HHE | FB590HHE | TD | 480 - 600 | 590 - 670 | 21 | 16 | 16 | 17 | 30 |
A80mm %: Percentage elongation after fracture using a specimen with gauge length L0 = 80 mm (ISO 6892-1 type 2 (EN20x80))
A50mm %: Percentage elongation after fracture using a specimen with gauge length L0 = 50 mm (ISO 6892-1 type 1 (ASTM12.5x50) or type 3 (JIS25x50)
A%: Percentage elongation after fracture using a proportional specimen with L0 = 5.65 (So)1/2
Ag %: Percentage plastic extension at maximum force
BH2: Increase in yield strength between a reference condition after a 2% plastic pre-strain and the condition obtained after heat treatment (170°C-20minutes)
HR480Y580T-FB-HHE: we recommend this option for parts requiring very high hole expansion (HHE: High Hole Expansion grade). For this grade, the minimum guaranteed JIS elongation is 18%.
Chemical composition
| Show all |
|
|
|
|
|
|
|
|
|
|
|
|---|---|---|---|---|---|---|---|---|---|---|---|
| ArcelorMittal name | Generic name | Max. C (%) | Max. Si (%) | Max. Mn (%) | Max. P (%) | Max. S (%) | Al (%) | Max. Cu (%) | Max. B (%) | Max. Ti + Nb (%) | Max. Cr + Mo (%) |
| HR300Y450T-FB | FB450 | 0.18 | 0.5 | 2.0 | 0.05 | 0.01 | 0.05 - 2.0 | 0.2 | 0.01 | 0.15 | 1 |
| HR400Y540T-FB | FB540 | 0.18 | 0.5 | 2.0 | 0.05 | 0.01 | 0.05 - 2.0 | 0.2 | 0.01 | 0.15 | 1 |
| HR460Y560T-FB | FB560 | 0.18 | 0.5 | 2.0 | 0.05 | 0.01 | 0.05 - 2.0 | 0.2 | 0.01 | 0.15 | 1 |
| HR480Y590T-FB-HHE | FB590HHE | 0.18 | 0.5 | 2.0 | 0.05 | 0.01 | 0.02 - 2.0 | 0.2 | 0.01 | 0.15 | 1 |
Ferritic-bainitic microstructure of HR400Y540T-FB
Global availability
Under development Customer trials Commercial unexposed only Commercial exposed and unexposed
| Show all |
|
|
|
|
|---|---|---|---|---|
| ArcelorMittal name | Generic name | Uncoated (-UNC) | Extragal® (-GI) | Zagnelis® Protect (-ZMP) |
| HR300Y450T-FB | FB450 | |||
| HR400Y540T-FB | FB540 | |||
| HR460Y560T-FB | FB560 | |||
| HR440Y580T-FB | FB580/FB590 | |||
| HR480Y590T-FB-HHE | FB590HHE |
| Show all |
|
|
|
|
|---|---|---|---|---|
| ArcelorMittal name | Generic name | Uncoated (-UNC) | Extragal® (-GI) | Zagnelis® Protect (-ZMP) |
| HR300Y450T-FB | FB450 | |||
| HR400Y540T-FB | FB540 | |||
| HR460Y560T-FB | FB560 | |||
| HR440Y580T-FB | FB580/FB590 | |||
| HR480Y590T-FB-HHE | FB590HHE |
| Show all |
|
|
|
|---|---|---|---|
| ArcelorMittal name | Generic name | Uncoated (-UNC) | Galvannealed (-GA) |
| HR300Y450T-FB | FB450 | ||
| HR400Y540T-FB | FB540 | ||
| HR460Y560T-FB | FB560 | ||
| HR440Y580T-FB | FB580/FB590 | ||
| HR480Y590T-FB-HHE | FB590HHE |
| Show all |
|
|
|
|---|---|---|---|
| ArcelorMittal name | Generic name | Uncoated (-UNC) | Extragal® (-GI) |
| HR300Y450T-FB | FB450 | ||
| HR400Y540T-FB | FB540 | ||
| HR460Y560T-FB | FB560 | ||
| HR440Y580T-FB | FB580/FB590 | ||
| HR480Y590T-FB-HHE | FB590HHE |
| Show all | |
|---|---|
| ArcelorMittal name | Generic name |
| HR300Y450T-FB | FB450 |
| HR400Y540T-FB | FB540 |
| HR460Y560T-FB | FB560 |
| HR440Y580T-FB | FB580/FB590 |
| HR480Y590T-FB-HHE | FB590HHE |
| Show all | |
|---|---|
| ArcelorMittal name | Generic name |
| HR300Y450T-FB | FB450 |
| HR400Y540T-FB | FB540 |
| HR460Y560T-FB | FB560 |
| HR440Y580T-FB | FB580/FB590 |
| HR480Y590T-FB-HHE | FB590HHE |
Under development
Customer trials
Commercial unexposed only
Commercial exposed and unexposed
Recommendations
High hole expansion grade
ArcelorMittal offers an HR480Y590T-FB-HHE (High Hole Expansion) grade, which is recommended for parts with sheared edge stretchability requirements (stretch flangeability, edge flanging, edge stress during secondary processing, etc.). The illustration opposite shows an example of hole expansion behaviour in accordance with the ISO standard for FB 590 and FB 590 HHE grades.
View of hole expansion in grades FB 590 and FB 590 HHE in 4 mm thickness.
The HHE achieves a much higher hole expansion value.
Forming
The graph below gives critical forming limits calculated for the Ferrite-Bainite family of steels in 2.5 mm thickness.
Please contact us for further information on forming steels in the Ferrite-Bainite range with specific thicknesses and coatings.
Welding
Examples of resistance spot-welding data obtained in accordance with the ISO 18278 method for coated and uncoated steels of different thicknesses in the Ferrite-Bainite product range. These steels can be arc welded.
| Show all |
|
|
|
|
|
|---|---|---|---|---|---|
| ArcelorMittal name | Coating | Thickness (mm) | Pure tensile (kN) | Weld diameter (mm) | Tensile-shear (kN) |
| HR300Y450T-FB | Uncoated | 2.5 | 25 | 12 | 37 |
| HR400Y540T-FB | Uncoated | 2.5 | 30 | 12 | 42 |
| HR460Y560T-FB | Extragal® | 2.5 | 30 | 10 | 44 |
| HR480Y590T-FB-HHE | Uncoated | 2.5 | 30 | 12 | 45 |
For information only, these are some of the welding parameters used in MAG welding:
- Filler metal: GS2-type wire
- Shielding gas: ATAL 5 or ATAL 18
- Welding speed: 80 cm/min
ArcelorMittal can provide technical assistance in adjusting the welding parameters of any other steel in the Ferrite-Bainite product range.
Fatigue strength
Ferrite-Bainite steels have good fatigue strength on account of their high tensile strength and their microstructure.
Examples of Wöhler curves for a variety of Ferrite-Bainite steels are given in the graph below. The curves plot maximum stress versus number of cycles to failure. They are calculated for a tension-tension loading ratio of R = 0.1.
ArcelorMittal can provide a full database on the fatigue performance of Ferrite-Bainite steels.
You may also be interested in
Multi Part Integration®
The power of less
Explore our steel solutions for
BEV and ICE vehicles
e-business
Multi Part Integration
Multi Part IntegrationMPI advantagesWhite paper: Multi Part Integration (MPI) - unlocking the power of less
Who we are
Your co-engineering partner Your global steel solution providerOur purpose: Smarter steels for people and planetInteractive map
Innovation
The future of steelGlobal R&DInnovation in practiceFast Lane: ArcelorMittal’s sampling and pre-serial production serviceCustomer statementsLatest customer cases
S-in motion® solutions
3D car configuratorBattery electric vehicles Battery pack for BEVChassisFront chassis for EVsRear Chassis for BEVsPickup trucksMid-size Sedan and SUVC-segment vehicles Light commercial vehicles Commercial trucksFront seatsSustainability
Climate action progressXCarb™ - towards carbon neutral steelSteel and the circular economy Smart carbon technologyClean power steelmakingCircular carbon steelmakingCapture and storage of fossil fuel carbonCommitment to ResponsibleSteel™ Life cycle assessmentRecycling advanced steelsOur automotive outcomesTailor your ArcelorMittal Automotive web experience
My ArcelorMittal Automotive space
This is your personal space on ArcelorMittal's global automotive website. You can keep your favorite ArcelorMittal automotive web pages and documents in a safe place
My spaceConfigure this website
If you want, you can tailor your web experience on this automotive website to your personal needs. By selecting your job profile and/or region (both optional) you enable us to personalize the content you see on this website.
No matter which job profile or region you select, you will always have unlimited access to all the information on this website. The only thing that changes is that you will be offered more tailored content. As well as your profile and region, we also use your browsing history on this website to remember your personal preferences and identify the most appropriate content for you.
We are confident that this will help you to find the inspiration you are looking for on the ArcelorMittal automotive website.
