PROCESS FOR MANUFACTURING SHEET OF AUSTENITIC STAINLESS STEEL HAVING HIGH MECHANICAL PROPERTIES AND SHEET THUS OBTAINED

摘要

The invention relates to a hot-rolled sheet made of austenitic stainless steel, the chemical composition of which comprises, the contents being expressed by weight: 0.015%≦C≦0.030%, 0.5%≦Mn≦2%, Si≦2%, 16.5%≦Cr≦18%, 6%≦Ni≦7%, S≦0.015%, P≦0.045%, Al≦0.050%, 0.15%≦Nb≦0.31%, 0.12%≦N≦0.16%, the Nb and N contents being such that: Nb/8+0.1%≦N≦Nb/8+0.12%, optionally: Mo≦0.6%, 0.0005%≦B≦0.0025%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting.