... Gr3, Gr5, Gr7, Gr9, Gr11, Gr12, Gr23 or as order2. Standard: ASTM B348, ASTM F136, ASTM F67, ... be used in the drawing parts for its good elongation and excellent corrosion-resistance.(2). grade 2 ... be used in some fittings parts and fastening pieces, but for complex shape need 300 degree celsius ... the titanium alloys because of its comprehensive mechanical and chemical properties.(6). Alloy grade 7 add ...