... ,Niobium as the dominant products in the scope of rare metal new materials, including many sorts and grades of their metals ... , sheet, tube, wire ,rod ,crucible , target ,alloy and so on.Tantalum ... metallurgy, chemical processing , hard alloy cutters , aerospace and aviation.Tantalum tube/pipe Material: RO5200, RO5400, RO5252(Ta-2.5W), RO5255(Ta ...