Section 15 Base metals and articles of base metal 74 Copper and articles thereof 74 09 Copper plates, sheets and strip, of a thickness exceeding 0.15mm. 74 09 40 Of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys..., Commodity Code Description 74 09 40 00 Of copper-nickel base alloys (cupro-nickel) or copper-nickel-zinc base alloys...,