Section 15 Base metals and articles of base metal 75 Nickel and articles thereof 75 07 Nickel tubes, pipes and tube or pipe fittings (for example, couplings, elbows, sleeves) 75 07 12 - - Of nickel alloys 75 07 12 00 - - Of nickel alloys Commodity Code Description 75 07 12 00 000 - - Of nickel alloys