U-Boat Steel

Some of our watches are made from Submarine Steel XM-19, that is an austenitic stainless steel with a blend of strength and corrosion resistance that is better than Stainless Steel like 316L.

In fact, XM-19 has twice the yield strength at room temperature compared to Stainless Steels 316L. Additionally, it has good mechanical properties at elevated and sub-zero temperatures. 

Other characteristics that set XM-19 apart from other grades of stainless steel are that it does not become magnetic when severely cold worked, and it has outstanding corrosion resistance in harsh environments such as marine applications.

Models that use this technology are indicated by this logo:

Submarine Steel watches and watch case, HY80, HY100, XM19 U-Boat Steel