... : main raw material to make metal titanium, also used to make titanium steel. Titanium sponge1) TG-TV gradeSpec: Ti 97%min, Fe 2 ... , Fe 0.10%max, Si 0.03%max, Cl 0.08%, C 0.03%max, N 0.02%max, O 0 ... .08%max Mn 0.01%max, Mg 0.07%max, H ... , O 0.15%max Mn 0.02%max, Mg 0.08%max, H 0.010% 6) Grade 4Spec: Ti 99.1 ... , N 0.10%max, O 0.30%max Mn 0.08%max, Mg 0.15%max, H 0.030%Size:10 ...