... (min) Purity:99.95%min ISO9001: 2000SGS Tantalum sheet/platesizes:3mm+Purity: 99.95%ISO9001: 2000Hlmet CO., ... new materials, including many sorts and grades of their metals, sheet, tube, wire ,rod ,crucible , target ,alloy and so ... agreed on by the supplier and buyer of negotiation. Chemical composition:Chemistry %DesignationChief componentImpurities maxmiumTaNbFeSiNiWMoTiNbOCHNTa1Remainder 0.0040.0030. ...