STEEL FOR MECHANICAL ARTICLES, METHOD FOR PRODUCTION OF MECHANICAL ARTICLES USING THIS STEEL AND MECHANICAL ARTICLES MADE BY THIS METHOD

摘要

The inventive steel for mechanical parts is characterised by the composition thereof expressed in the following percentagуs by weight: 0.19% = С =0.25%; 1.1% = Mn =1.5%; 0.8% = Si =1.,2%; 0.01% = S =0.09%; traces = P =0.025%; traces = Ni=0.25%; 1% = Cr = 1.4%; 0.10% = Mo =0,25%; traces = Cu=0.30%; 0.01% = Al =0.045%; 0.010% = Nb =0.045%; 0.0130% = N =0.0300%; optionally traces = Bi =0.10% and/or traces = Pb =0.12% and/or traces = Те =0.015% and/or traces = Se =0.030% and/or traces = Ca =0.0050%. The rest being iron and impurities resulting from preparation, a chemical composition being adjusted in such a way that mean valuesetof five Jominy tests are such as; and. A method for producing a mechanical part from said steel and the thus obtainable mechanical part are also disclosed.