{"q":"ductile","type":"material","total":61,"rows":[{"code_type":"material","code":"CI","meaning":"Cast Iron","count":25359,"pct":51.32,"notes":"Grey cast iron, the oldest common watermain material in Toronto; dominant from the 1870s through the 1960s. Brittle relative to ductile iron, which is why break rates rise with age."},{"code_type":"material","code":"DIP","meaning":"Ductile Iron Pipe","count":4440,"pct":8.99,"notes":"Ductile (nodular) cast iron; stronger and more flexible than grey cast iron. Became the standard iron pipe from the 1960s on."},{"code_type":"material","code":"DICL","meaning":"Ductile Iron, Cement Lined","count":1485,"pct":3.01,"notes":"Ductile iron pipe with a cement-mortar lining that protects against internal corrosion."}]}