Section 15 Base metals and articles of base metal 72 Iron and steel 72 06 Iron and non-alloy steel in ingots or other primary forms, nes 72 06 10 Containing by weight more than 0.6 % of carbon 72 06 10 10 Containing by weight more than 0.6 % of carbon Commodity Code Description 72 06 10 10 00 Containing by weight more than 0.6 % of carbon