"SOME STEEL IS MORE AMBITIOUS THAN OTHERS.
Only Rolex uses 904L steel for its steel watch cases. 904L is a super alloy usually reserved for the chemical industries. Where maximum resistance against corrosion is essential. Corrosion resitance stems from 904L's higher cromium content, which forms a thin, impervious barrier on the alloy's surface when exposed to oxygen. In the event of a scratch, the cromium oxide barrier fills and protects it immediately, effectively reducing the scratch's propensity for rusting. 904L steel is so hard that Rolex even had to develop special equipment to machine it. A mighty 250-ton press is necessary just to stampo out a single oyster case from a solid block of 904L. When it comes to ensuring the lasting beaty of your watch, no measure is too extreme for Rolex."
εχω αναφερθει στο παρελθον στο θεμα ,απλα βρισκω την συγκεκριμενη κατατοπιστικη
