High silicon stainless steel

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A high-Si stainless steel excellent in various characteristics, inclusive of strength, corrosion resistance, workability and castability, consists of, on the mass % basis, Si : 2 to 5%, Cr : 8 to 25%, Ni : 4 to 16%, Mn : not more than 5%, Cu : not more than 4%, Co : not more than 8%, Mo : not more than 4%, Nb : not more than 3%, Ta : not more than 3%, Ti : not more than 3%, W : not more than 4%, V : not more than 4%, B : not more than 0.01%, Mg : not more than 0.01%, Ca : not more than 0.01%, rare earth elements : not more than 0.01%, the balance being Fe. Impurities in this steel are as follows : C : not more than 0.04%, P : not more than 0.03%, S : not more than 0.02%, Al : not more than 0.03%, N (nitrogen) : not more than 0.05%, O (oxygen) : not more than 0.005%, and H (hydrogen) : not more than 0.0003%.