Docol high edge (HE) ductility HSLA/AHSS steel

Docol® high edge ductility HSLA/AHSS steel has greatly improved formability and hole expansion ratios — ideal for challenging auto components with complex designs on sheared stretched edges.

Main characteristics of Docol high edge ductility HSLA/AHSS steel

  • Improved hole expansion ratios: up to 30% better than conventional HSLA/AHSS steels.

  • Greatly increased local formability, providing ductility for complex geometries on stretched edges.

  • Excellent cut/sheared edge quality, significantly reducing micro cracks and burrs.

  • Bending radius of 0.0 xt can be guaranteed.

  • Excellent for fineblanking and energy-efficient cold-forming of automotive parts with complex edges.

Docol 800HE

Meet these new hot-rolled 800MPa steels

To form or stretch cut edges that are crack-free can be a major challenge when working with advanced-high strength steels (AHSS). To reduce the risk of cracked raised edges, SSAB has introduced three new hot-rolled 800 megapascal steels with extremely high edge ductility.

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Applications for Docol high edge ductility HSLA/AHSS steels

Docol® HE is suitable for a wide range of chassis components, consoles, seats and parts in power trains, clutches, couplings and any component that is stamped with a stretched edge. Fine blanking with Docol® HE is also excellent, which opens for new areas of use.

Fully certified

Docol® HE grades meet and exceed EN10149-2. They can be delivered with dual certifications in order to solve current production issues or enable new complex designs without having to change existing standards.

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Improved HSLA/AHSS formability through exceptionally clean production

Microstructure standard grade and Docol HE grade

Left: Standard MC/LA grade. Right: Docol® HE grade HSLA/AHSS.

Docol high edge ductility steels have a much finer microstructure and perlite distribution than conventional HSLA/AHSS steels. SSAB’s exceptionally clean and closely controlled production methods allow us to precisely and consistently achieve this advanced microstructure — which is essential for increased formability, tight radii bending, and crack-free sheared cuts on stretched edges. And Docol HE steels’ low alloy content makes welding straightforward, using conventional processes.

greatly increased high edge ductility steel

Docol® HE can help you solve part defects such as cracks on outer edges and micro cracks on stretched punched holes.

Testing Docol HE: a demanding fineblanking test

Watch our customer test Docol high edge ductility HSLA/AHSS by fineblanking a “cogwheel” pattern with teeth having a 0.3mm radii and 30° angles.

Grades and mechanical properties for Docol high edge ductility steel

For best weight reduction, use higher grades with reduced thicknesses. All Docol HE grades are hot-rolled and meet EN10051 dimensional tolerances.
Note: Docol 550HE, Docol 700HE, Docol 800HE and Docol 1000HE are all either under development or available for trails — contact your Docol representative for the latest information.

PRODUCT NAME COATING DIMENSIONS STANDARDS
Docol 355HE   T: 2 - 7 mm SSAB
Docol 420HE   T: 2 - 7 mm SSAB
Docol 460HE   T: 2 - 7 mm SSAB
Docol 500HE   T: 2 - 7 mm SSAB

Forming Docol high edge ductility steel

  • Ideal for fineblanking — opening up HSLA/AHSS to new, complex designs and new component applications.

  • Enables multiple, complex, crack-free forming operations along sheared stretched edges.

  • Hole expansion ratios that are 30% better than conventional HSLA/AHSS.

  • Bend radius of 0.0 xt can be guaranteed.

  • Excellent for cold-forming of automotive components.

  • Low alloy composition allows conventional welding and resistance spot welding.

  • Reduced tool wear.

 

For specific forming guidance for your high edge ductility component, please contact our Technical Support.

Forming Docol High edge ductility steel

Additional benefits from Docol high edge ductility HSLA/AHSS steels

  • Good fatigue properties.

  • Eight grades: Docol 355HE, Docol 420HE, Docol 460HE, Docol 500HE, Docol 550HE, Docol 700HE, Docol 800HE, and Docol 1000HE.

  • Global availability and support.



OEM-specific high edge ductility HSLA/AHSS

Docol 355HE, Docol 420HE, Docol 460HE, and Docol 500HE are made to SSAB specifications and can be dual certified with corresponding MC grades in EN 10149-2. In addition, we work closely with auto OEMs and Tier 1 suppliers to develop innovative, customized, high edge ductility steels for your specific components’ requirements.

Why Docol high edge ductility (HE) steel matters to you

Production engineers: Reduce micro cracks, burrs, and other defects on complex sheared stretched edges. Leverage the higher hole expansion ratios of Docol HE HSLA/AHSS steels in new, demanding part designs.

Lightweighting engineers: Achieve thinner and lighter parts by specifying SSAB’s new, higher strength Docol HE AHSS grades.

Procurement officers: Buy less materials, as you greatly reduce the number of defective components with cracked sheared edges.

Sustainability officers: 100% recyclable Docol high edge ductility steels are made at our extremely CO2-efficient mills — 7% more efficient than the average European steel mill.

Lower your embedded CO2

Docol high edge ductility steel is “future proofed”.

TRIAL MATERIAL STOCK

Try it for yourself

Our Trial Material Stock Center is a unique service to the automotive industry. We ship coils, sheets, and custom lengths of any size to anywhere in the world. In 1-2 weeks the material is ready for dispatch.