Section 15 Base metals and articles of base metal 72 Iron and steel 72 28 Other bars and rods; angles, shapes and sections of other alloy steel 72 28 50 Bars and rods of alloy steel, nes, cold-formed or cold-finished Commodity Code Description 72 28 50 00 Bars and rods of alloy steel, nes, cold-formed or cold-finished 72 28 50 10 Of circular cross-section 72 28 50 90 Other