Description: Tantalum Foil, Tantalum Tungsten Alloy Foil (Ta-2.5W, Ta-10W) Grade: RO5200, RO5400, RO5252(Ta-2.5W), RO5255(Ta-10W) Standard: ASTM B708 Purity: Ta 99.95% or 99.99% Application: Tantalum Foil is used in chemical process equipment, cathodic protection systems for steel structures such as