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 more than 0.5% of phosphorous Commodity Code Description 72 01 20 00 - Non-alloy pig iron containing by weight more than 0.5% of phosphorous