m303M303 Chemical Composition, Mechanical Properties, Heat Treatment, M303 Datasheets, M303Supplier Author: Pan Bao - solew@ Subject: M303 Datasheets Keywords: M303BÖHLER M303 EXTRA is a corrosion-resistant, martensitic chromium steel with very good toughness, corrosion resistance, good wear resistance and improved machinability and polishability. Compared to 1.2316, BÖHLER M303 EXTRA