Section 15 Base metals and articles of base metal 72 Iron and steel 72 28 Other bars and rods of other alloy steel; angles, shapes and sections, of other alloy steel; hollow drill bars and rods, of alloy or non-alloy steel. 72 28 50 Other bars and rods, not further worked than cold-formed or cold-finished Commodity Code Description 72 28 50 00 Other bars and rods, not further worked than cold-formed or cold-finished