... , which is the leading titanium manufactory and supplier in the world. LTM TITANIUM manufacture Titanium Disc, Titanium Ring. Standard: ASTM B381 ... , ASME SB381, AMS, MIL, DIN, BS, JIS, GB, ISO, etc. Grade: Gr1, Gr2 ... , Gr3, Gr4, Gr5, Gr6, Gr7, Gr9, Gr11, Gr12, Gr23, (3)Titanium disc size (mm): diameter 50 ...