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This specification covers a nickel-iron alloy in the form of round wire clad with electrolytic copper.

This specification covers a palladium-silver alloy in the form of round wire 0.004 to 0.080 inch (0.10 to 2.03 mm), inclusive, in nominal diameter (see 8.5).

This specification covers vacuum-arc-cast molybdenum in the form of wrought round bars.

This specification covers an arc-cast molybdenum alloy in the form of round bars 0.125 to 4.5 inches (3.00 to 112.50 mm), inclusive (see 8.6).

This specification covers a tantalum alloy in the form of sheet, strip, and plate from 0.010 through 0.250 inch (0.25 through 6.35 mm), inclusive (see 8.5).

This specification covers a tantalum alloy in the form of bars and rods up through 3.5 inches (88.9 mm), inclusive (see 8.5).

This specification covers tantalum in the form of sheet, strip, plate, and foil up through 0.1875 inch (4.75 mm), inclusive (see 8.7).

This specification covers columbium in the form of sheet, strip, plate, and foil.

This specification covers a columbium (niobium) alloy in the form of foil, sheet, strip, or plate.