Tantalum Spring is made of tantaloy "61" metal wire, NRC91 or 10% tungsten, 90% tantalum alloy. (or 7.5% ... % Ta) Tantaloy Inlet Spring is made of tantaloy "61" metal wire, NRC91 or 10% tungsten, 90% tantalum alloy, which can provide ... springs. It is also used for chemical process equipment including heating and cooling coils, heat exchangers, condensers, reaction vessels, leaf springs ...