Thyssenkrupp presents innovative door ring at Blechexpo 2025.

From Eight to One Thyssenkrupp Steel Introduces Innovative Door Ring for Vehicles

2025-10-24 From Thyssenkrupp Steel | Translated by AI 2 min Reading Time

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Blechexpo 2025 is seen by Thyssenkrupp Steel as an opportunity to present what is described as an innovative and material-efficient door ring for vehicle construction ...

Thyssenkrupp Steel aims to make vehicle construction slightly more cost-effective and sustainable with the innovative door ring. Read here what the company means by this ...(Image: Thyssenkrupp Steel) — Thyssenkrupp Steel aims to make vehicle construction slightly more cost-effective and sustainable with the innovative door ring. Read here what the company means by this ...
(Image: Thyssenkrupp Steel)

Thyssenkrupp Steel aims to introduce an innovative solution for the automotive industry with the new Door Ring concept, as reported. The Door Ring, made from a single tailored blank, replaces up to eight individual components in the vehicle structure. It has the potential to significantly simplify lightweight body construction for the future while simultaneously increasing efficiency without compromising on safety. The mentioned Door Ring is part of the "InPart Solutions" concept, with which the company seeks to specifically reduce complexity in vehicle manufacturing. The goal is to lower material consumption, joining operations, and ultimately production costs through component integration, according to the company. As part of a comprehensive lightweight construction concept, the Door Ring demonstrates how performance, efficiency, and sustainability can be combined in vehicle production. According to Thyssenkrupp Steel, the development was carried out in close collaboration with Baosteel Tailored Blanks, a long-standing partner for customized tailored blanks and joining technologies. By enabling the integration of multiple components, vehicle manufacturers can simplify production processes and enhance the performance of future vehicles thanks to the lightweight construction approach.

Large Jumps in Material Thickness are Welded Using Gonatech

According to Thyssenkrupp Steel, the idea of the Door Ring is based on a tailored blank that combines various steel grades with locally differing properties (thickness, strength, and coating). High-strength materials such as MBW 1200+AS, MBW 1500, and 1900+AS Pro are used precisely where they are most needed for crash safety and lightweight construction. Manganese-boron steels (MBW) with strengths of up to 1,900 MPa ensure maximum material efficiency. Simulations with the reference body of a compact car revealed that up to 12.8 pounds per vehicle could be saved compared to previous designs. The special challenges in manufacturing the Door Ring—such as significant jumps in material thickness—are addressed by innovative joining methods like the so-called Gonatech welding, which enables the welding of blanks without delamination, thereby saving costs, as Thyssenkrupp Steel explains. Not to be overlooked is the fact that the Door Ring is a comparatively sustainable product due to its design. This is because far less material is needed than before, and the reduction in vehicle weight saves fuel and thus CO₂.

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Date: 08.12.2025

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