Section 15 Base metals and articles of base metal 72 Iron and steel 72 01 Pig iron and spiegeleisen in pigs, blocks or other primary forms 72 01 20 Non-alloy pig iron containing by weight 0.5% of phosphorus 72 01 20 00 Non-alloy pig iron containing by weight 0.5% of phosphorus Commodity Code Description 72 01 20 00 000 Non-alloy pig iron containing by weight 0.5% of phosphorus