Section 15 Base metals and articles of base metal 72 Iron and steel 72 07 Semi-finished products of iron or non-alloy steel 72 07 12 - - - Blooms and billets, of non-alloy steel Commodity Code Description 72 07 12 10 - - - Blooms and billets, of non-alloy steel 72 07 12 90 - - - Other