The Combined Nomenclature (CN), v1:2018
manganese, 0,6% to 2,3% of silicon, or of steel containing by weight >= 0,0008% of boron with any other element < the minimum content referred to in Note 1 f
https://www.dst.dk/en/Statistik/dokumentation/nomenklaturer/kn?id=97dd4f6e-1b47-43b5-8532-380d3d1b7c2f