... Titanium sponge1) TG-TV gradeSpec: Ti 97%min, Fe 2.0%max, Mg 0.5%max, Si 0.1 ... , Mn 0.05%max, N 0.1%max2) Grade 0Spec: Ti 99.7%min, Fe 0.06%max ... , Mg 0.06%max, H 0.005%3) Grade 1Spec: Ti 99.6%min, Fe 0.10%max ... , Mg 0.07%max, H 0.005%4) Grade 2Spec: Ti 99.5%min, Fe 0.15%max ... , Mg 0.08%max, H 0.010% 6) Grade 4Spec: Ti 99.1%min, Fe 0.30%max, ... max, Mg 0.09%max, H 0.012%.7) Grade 5Spec: Ti 98.5%min, Fe 0.40%max ...