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 eg,couplings,elbows,sleeves). 75 07 12 Of nickle alloys 75 07 12 00 Of nickle alloys Commodity Code Description 75 07 12 00 000 Of nickle alloys