The Combined Nomenclature (CN), v1:2018
7226 91 91: Flat-rolled products of alloy steel other than stainless steel, simply hot-rolled, of a thickness of >= 4,75 mm, of a width of < 600 mm (excl. of tool steel, silicon-electrical steel or high speed steel)
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=bdccfab4-a71c-4f32-8b96-d3d9ed56013c