US 11,920,206 B2
Cold rolled flat steel product for packaging and method for producing a steel flat product
Burkhard Kaup, Andernach (DE); Peter Kirchesch, Koblenz (DE); Manuel Köhl, Mending (DE); Dimitrios Nouskalis, Burgbrohl (DE); Alexander Gossen, Rengsdorf (DE); and Björn Ehmke, Sankt Johann (DE)
Assigned to thyssenkrupp Rasselstein GmbH, Andernach (DE)
Filed by thyssenkrupp Rasselstein GmbH, Andernach (DE)
Filed on Oct. 3, 2022, as Appl. No. 17/958,603.
Claims priority of application No. 10 2021 125 692.5 (DE), filed on Oct. 4, 2021.
Prior Publication US 2023/0107544 A1, Apr. 6, 2023
Int. Cl. C21D 8/02 (2006.01); C21D 9/46 (2006.01); C21D 9/573 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)
CPC C21D 8/0236 (2013.01) [C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C21D 8/0273 (2013.01); C21D 9/46 (2013.01); C21D 9/573 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C21D 2211/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cold rolled flat steel product for packaging with a thickness of less than 0.49 mm and the following composition in terms of weight:
C: 0.01-0.1%,
Si: <0.03%,
Mn: <0.6%,
P: <0.1%,
S: <0.03%,
Al: <0.1%,
N: <0.02%,
optional Cr: <0.1%,
optional Ni: <0.1%,
optional Cu: <0.1%,
optional Ti: <0.01%,
optional B: <0.005%,
optional Nb: <0.01%,
optional Mo: <0.02%,
optional Sn: <0.03%, and
residual iron and unavoidable impurities,
wherein the flat steel product has a martensite-free microstructure and a flatness of 5 I-units or less.