... /348,AMS 4928 3.SGS report 4.OD:50-3000mm Titanium rings1 Grade: Gr1,Gr2,Gr3, Gr.5,Gr7, Gr9,Gr122 ... material are come from ZUNYI factory(one of the largest titanium sponge manufacturer in China) -----Chemical composition, Mechanical properties, Microstructure are ... as SGS------More than10 year's experience, exported various of titanium products over than 2000 MT yearly ------Delivery on time6.Quality ...