Thyssen Krupp Ag

Thyssenkrupp Steel Europe Ag

Jörg Steinebrunner

Marc Blumenau

Udo Zocher

A cold-rolled and recrystallization-annealed flat steel product may include a ferritic microstructure, which possesses optimized formability and suitability for a wide variety of applications, including painting, for example. The flat steel product may include a steel comprising (in percent by weight): C: 0.0001%-0.003%, Si: 0.001%-0.025%, Mn: 0.05%-0.20%, P: 0.001%-0.015%, Al: 0.02%-0.055%, Ti: 0.01%-0.1%. The steel may further include at least one of Cr: 0.001%-0.05%, V: up to 0.005%, Mo: up to 0.015%, or N: 0.001%-0.004%, which may have the following mechanical properties: Rp0.2&#x3c;180 MPa, Rm&#x3c;340 MPa, A80&#x3c;40%, and n value &#x3c;0.23. At least one surface may have an arithmetic mean roughness Ra of 0.8-1.6 &#x3bc;m and a peak count RPc of 75/cm. The present disclosure also concerns methods for producing flat steel products.

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Duisburg, Germany

Jörg Steinebrunner