Hardcor Shield ® is a patented hightech surface hardening method  that increases the surface hardness up to 6 times the normal hardness of the base material through multiple heat treatments and diffusion of carbon atoms in the base material.

Due to this labor-intensive process, these metals are surface hardened and up to 1300HV without loss of shape, color or corrosion resistance.  

This treatment creates a highly impact-resistant, scratch-resistant and corrosion-resistant watch case that is ideal for watches that are built for use in extreme sports or diving, for example. 

The surface hardening ensures a watch case that, even with years of use, is extremely well protected against corrosion, dents or scratches that would be immediately visible with normal untreated stainless steel.

Models that use this technology are indicated by this logo:

HARDCOR Shield Surface hardening technique for watches