Osorio de CastroStand: 4H06Certifications and quality assurancehttps://osoriodecastro.com/Aceros de Cementación18CrMo4 / 16MnCr5 / 20MnCr5Other productsCarbon steelsEasy Cut steelsPre-treated steels (Quenching and tempering)Cast ironHard Chromed / Tempered Hard chromeInner Lapped Tube H8/H9Other alloys