Tantalum Tantalum is a grey blue, heavy, and very hard metal which is almost completely immune to chemical attack under temperatures below 150°C. Tantalum is ductile and it can be drawn into fine wire used as filament for evaporation purpose. This element has a very high melting point of 2996°C, exceeded only by tungsten and rhenium.   The essentials: .Chemical formula: Ta . Color : grey blue .Atomic number: 73 .Atomic weight: 180.94788 (2) .CAS registry number: 7440-25-7 Our tantalum products is available in a wide range of forms including powder, wire, foil, sheet, rod, strip, plate, tube, alloys and etc. 1) Tantalum powder 2) Tantalum wire 3) Tantalum foil 4) Tantalum sheet 5) Tantalum rod 6) Tantalum strip 7) Tantalum plate 8) Tantalum tube 9) Tantalum boats&crucibles 10) Tantalum pentoxide(Ta2O5) 11) Tantalum carbide 12) Tantalum alloys (Ta/W, Ta/Nb) We also supply customer-made products upon your request.