Tantalum Material Lamp Seal material manufactured by H Cross CompanyTantalum can be used as the welding interface between the etched molybdenum, the lamp electrode and lead wire.

The tantalum is manufactured under the same stringent controls as the etched molybdenum and is the most economical of the welding fluxes.

H. Cross Company can supply tantalum products in wire, rod, ribbon, strip, sheet and foil forms at 99.95% purity and in wire, strip and ribbon at 99.995% purity for specialized applications such as filament materials. If you have specific requirements, please Contact Us or by phone for further information or assistance.

Sizes available

Wire Diameter .005″ to .050″
Ribbon Thickness .0007″ to .007″
Width .020″ to .125″

Standard Tolerances

Thickness Inches Tolerance Inches* Width Inches Tolerance Inches*
.0005” to .0019” +/- .00005” .006” to .0109” +/- .0005”
.002”   to .0029” +/- .0001” .011” to .0209” +/- .001”
.003”   to .0039” +/- .00015” .021” to .0309” +/- .0015”
.004”   to .0049” +/- .0002” .031” to .0609” +/- .002”
.005”   to .0069” +/- .00025” .061” to .0999” +/- .003”
.007”   to .0109” +/- .00035” .100” to .125” +/- .005”
.011”   to .0309” +/- .0005”

* Closer tolerances can be maintained if required for your applications

If you require a size outside of the normally available ranges Contact Us and we will be glad to accommodate your needs if possible.