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perform® – hot-rolled micro-alloyed and highly ductile micro-alloyed steel for the automotive industry

Hot-rolled micro-alloyed and highly ductile micro-alloyed steel for the automotive industry.

Higher-strength hot-rolled steels for cold forming – an attractive solution for vehicle and commercial vehicle construction

When high strength and excellent forming properties for weight-optimized complex components and component groups are required, such as the wheel suspension in the chassis or the axle construction of trucks, hot-rolled micro-alloyed steels of thyssenkrupp Steel, HR300LA to HR700LA in accordance with VDA 239-100 or S315MC to S700MC in accordance with DIN EN 10149-2, are the go-to materials.

Micro-alloyed steels are characterized by particularly low sulfur contents, low carbon contents and microalloys of niobium, vanadium, titanium and their combination – the latter is used to obtain different strength variants. Micro-alloyed steels possess excellent forming and welding properties. Moreover, the extremely fine-grained microstructure results in excellent toughness combined with a low susceptibility to cold cracking. New in our product portfolio: Micro-alloyed HD grades featuring a significantly narrower range of mechanical properties and increased elongation at fracture compared to the standard.

Thermo-mechanically rolled higher-strength steel for cold forming is available as uncoated hot wide strip and cut-to-length sheet in accordance with VDA 239-100 and DIN EN 10149-2, in accordance with the perform® product information and in the scalur® variant. The portfolio comprises a variety of strength values with yield strengths ranging from 300 to 700 MPa – the best prerequisite for optimum material selection to meet the requirements of the component in question.

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Excellent processing properties for automotive construction: new highly ductile micro-alloyed (HD) steels with uniform properties and improved elongation at break

Highly ductile micro-alloyed (HD) steels for wheel suspensions.
Highly ductile micro-alloyed (HD) steels for wheel suspensions.

Owing to their good processing performance, hot-rolled micro-alloyed steels have proved their value in automotive construction – particularly for chassis and seats. The new highly ductile (HD) grades of thyssenkrupp Steel boast a uniform property profile tailored to the intended use as well as an improved forming potential. If the right material is selected, the weight of the component can also be reduced.

Novel micro-alloyed HD grades for optimum component-related material selection

Be it in seat components such as underbody side parts and seat rails, axles or wheel suspensions: Component geometries are becoming increasingly complex and the demand for their dimensional accuracy is rising, while in parallel material strengths continue to increase. In short: the automotive industry demands improved material properties. We meet these requirements by novel hot-rolled micro-alloyed HD grades featuring a significantly narrower range of mechanical properties and increased elongation at break compared to the standard. The HD grades are available based on VDA 239-100 and DIN EN 10149-2.

Highly ductile micro-alloyed steels for subframes.
Highly ductile micro-alloyed steels for subframes.

Consistently easy to process

The special alloy of the new highly ductile micro-alloyed steel grades ensures stable mechanical properties – best prerequisites for high production reliability. A high yield strength ratio gives the designer sufficient leeway to prevent possible component failure due to overloading. The very low carbon equivalent lends micro-alloyed steels outstanding welding properties.

thyssenkrupp Steel provides extensive material data for selected hot-rolled steels in order to exploit the potential of the new HD grades to the full and predict forming and crash behavior by means of simulation.

The new micro-alloyed HD steels are characterized by a much narrower range of mechanical properties compared to the standard and have a significantly increased elongation at fracture.

Product Manager Alexander Lange

Advantages of micro-alloyed HD steels

  • Improved cold forming properties for complex component geometries
  • Significantly increased elongation at fracture
  • Very tight thickness tolerances of hot wide strip
  • Reduced production costs in the press shop thanks to application-oriented properties
  • Guaranteed narrower range of mechanical parameters compared to standards VDA 239-100 and DIN EN 10149-2
  • Lightweighting potential owing to reduced sheet thickness
  • Excellent surface quality

Highly ductile micro-alloyed steel for cold forming
VDA 239-100, DIN EN 10149-2

Steel grade
­
­ 		Reference grade
DIN EN 10149-2 		Reference grade
VDA 239-100 		Material no.
­
­ 		Thickness1
from _ to in mm 		Width1
from _ to in mm
perform® 315 HD S315MC – 1.0972 1.50 – 6.00 50 – 1,600
perform® 340 HD S340MC HR340LA – 1.50 – 6.00 50 – 1,600
perform® 355 HD S355MC – 1.0976 1.50 – 6.00 50 – 1,600
perform® 420 HD S420MC HR420LA 1.0980 1.50 – 6.00 50 – 1,600
perform® 460 HD S460MC HR460LA 1.0982 1.80 – 6.00 50 – 1,600
perform® 500 HD2 S500MC HR500LA 1.0984 1.50 – 5.49 50 – 1.600
perform® 550 HD S550MC HR550LA 1.0986 1.50 – 6.00 50 – 1,600
1. Not all thickness and width combinations possible. | 2. Available in the product version scalur®.

Higher-strength micro-alloyed thermo-mechanically rolled steels with excellent cold forming properties

Micro-alloyed steels for cold forming für deck cranes and jibs in special vehicle construction.
Micro-alloyed steels for cold forming for deck cranes and jibs in special vehicle construction.

Thanks to their fine-grained microstructure and high degree of chemical purity, thermomechanically rolled micro-alloyed steels offer excellent forming properties, particularly in bending and press braking, as well as excellent welding characteristics. Moreover, the higher-strength steels for cold forming are very well suited for laser cutting, drilling and punching and – being available in a wide range of strengths - can be used for complex structures such as side beams, frame structures, formed and pressed parts, and profiles.

Advantages of micro-alloyed steels for cold forming

  • Outstanding surface quality
  • Press braking and bending with very low radii
  • Ideal for cutting, drilling or punching
  • Minimum yield strength from 300 to 700 MPa coupled with excellent cold forming characteristics
  • Very good toughness
  • Excellent welding characteristics (low CE-/CET values)

Micro-alloyed steel for cold forming
VDA 239-100, DIN EN 10149-2

Steel grade
­
­ 		Reference grade
DIN EN 10149-2 		Reference grade
VDA 239-100 		Material no.
­
­ 		THICKNESS1
from _ to in mm 		WIDTH1
from _ to in mm
perform® 300 – HR300LA – 2.00 – 12.50 50 – 2,000
perform® 315 S315MC – 1.0972 1.50 – 12.50 50 – 2,000
perform® 340 – HR340LA – 1.50 – 25.00 50 – 2,000
perform® 355 S355MC – 1.0976 1.50 – 25.00 50 – 2,000
perform® 380 – HR380LA 1.0978 1.50 – 20.00 50 – 2,000
perform® 420 S420MC HR420LA 1.0980 1.50 – 20.00 50 – 2,000
perform® 460 S460MC HR460LA 1.0982 1.80 – 20.00 50 – 2,000
perform® 500 S500MC HR500LA 1.0984 1.50 – 20.00 50 – 2,000
perform® 550 S550MC HR550LA 1.0986 1.50 – 8.50 60 – 2,000
perform® 600 S600MC HR600LA 1.8969 2.00 – 9.50 80 – 1,800
perform® 650 S650MC HR650LA 1.8976 2.00 – 12.00 80 – 1,600
perform® 700 S700MC HR700LA 1.8974 2.00 – 12.00 80 – 1,800
1. Not all thickness and width combinations possible.

You can find hot-dip galvanized micro-alloyed steel grades according to DIN EN 10346 and VDA 239-100 here.

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Contact

thyssenkrupp Steel Europe AG

Kaiser-Wilhelm-Strasse 100

47166 Duisburg, Germany

+49 (0)203 52-0

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