ELECTRICAL CONTACTS

POWDER METALLURGY COMPOSITIONS AND ALLOYS OF REFRACTORY METALS, PRECIOUS METALS AND METALLIC AND NONMETALLIC ELEMENTS AND COMPOUNDS CONTAINING TWO OR MORE OF THE FOLLOWING: TUNGSTEN, MOLYBDENUM, SILVER, COPPER, GOLD, PLATINUM, RUTHENIUM, IRIDIUM, PALLADIUM, COBALT, NICKEL, CADMIUM, GERMANIUM, IRON, CARBON OR TUNGSTEN CARBIDE

ALLOYS OF PRECIOUS, SEMI-PRECIOUS, OR RARE METALS, CONTAINING SOME OR ALLOF THE ELEMENTS: GOLD, SILVER, PLATINUM, PALLADIUM, RUTHENIUM, AND THE LIKE