Minerals & Metallurgy: Tantalum sheets Grade: Ta1,Ta2,FTa1,FTa2 Chemical composition: Fe,Si,Ni,W,Mo,Ti,Nb,O,C,H,N,Ta ... Minerals & Metallurgy: Tantalum sheet1. Chemical compositionGradeChemical composition, maxFeSiNiWMoTiNbOCHNTaTa10.0050.0050 ... requirements to be agreed upon by the supplier and buyer. Minerals & Metallurgy