Unwrought, partly wrought and wrought metals; unwrought, partly wrought and wrought iron alloys; alloys of nickel and iron; unwrought, partly wrought and wrought iron-nickel alloys; iron-nickel alloys in the form of bars, blooms, billets, forgings, plates, rods, sheets, strip, tubing and wire; unwrought metal used for electrical purposes; partly wrought metal for electrical purposes; welding rod; welding wire; and low coefficient of thermal expansion alloys.;