Use of martensitic chromium steel with specified portion of carbon obtained by quench hardening in form of heat treatment and subsequent quenching without embroidering from ferritic steel material, for watches, watch parts and jewelry

摘要

Use of nickel-free, molybdenum-free and vanadium-free martensitic chromium steel with at least one portion of carbon content of 0.2% obtained by a quench hardening in the form of heat treatment and subsequent quenching without embroidering from a ferritic steel material, for watches, watch parts, jewelry and belt buckles, is claimed.