... composition: Fe,Si,W,Mo,Ti,Cr,Ta,Ni,O,C,H,N Minerals & Metallurgy: Niobium sheet1. Chemical compositionGradeChemical composition, %, maxFeSiMoWTiCrTaNiOCHNNbTa10.0050 ... requirements to be agreed upon by the supplier and buyer. Minerals & Metallurgy