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 Commodity Code Description 72 28 10 - Bars and rods, of high speed steel 72 28 20 - Bars and rods, of silico-manganese steel 72 28 30 - Other bars and rods, not further worked than hot- rolled, hot-drawn or extruded 72 28 40 - Other bars and rods, not further worked than forged 72 28 50 - Other bars and rods, not further worked than cold- formed or cold-finished 72 28 60 - Other bars and rods 72 28 70 - - - Angles 72 28 80 - Hollow drill bars and rods