Patent ID: 6921511

Claim:
Ferritic stainless steel for use only in ferromagnetic parts, characterized in that it comprises in its composition by weight: C≦0.030% 1.0%<Si≦3% 0.1%<Mn≦0.5% 10%≦Cr≦13% 0%<Ni<1% 0.03%<S<0.5% 0%<P≦0.030% 0.2%<Mo≦2% 0%<Cu≦0.5% 0%<N≦0.030% 0%<Ti≦0.5% 0%<Nb≦1% 0%<Al≦100×10 −4 % 30×10 −4 %<Ca≦100×10 −4 % 50×10 −4 %<O≦150×10 −4 % the ratio of the calcium content to the oxygen content Ca/O being 0.3≦Ca/O≦1, the balance being iron and the inevitable impurities from the smelting of the steel, the steel being further characterized in that the steel contains lime aluminosilicate inclusions of anorthite and/or pseudowollastonite and/or gehlenite, associated with inclusions of chromium and manganese sulphide.