Common metals in powder form; zirconium; laths of metal; titanium; common metals, unwrought or semi-wrought; copper, unwrought or semi-wrought; alloys of common metal; ingots of common metal; nickel; anti-friction common metal; magnesium; filings of metal; sheet piles of metal, namely, pilings of metal; posts of metal; props of metal; sheets and plates of metal; poles of metal; elbows of metal for pipes; penstock pipes of metal; pipes of metal; water-pipes of metal; gratings of metal; buildin...