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 70 - - - Angles Commodity Code Description 72 28 70 10 - - - Angles 72 28 70 20 - - - Shapes and sections