Index & Notes

Main break rates by material type

But YDI was well worth it. This graph shows the main break rates in the traditional unit of breaks per year per hundred kilometres. The ductile iron, in red, is the worst with numbers in the thirties, the thicker cast iron in blue is better with about 20 breaks per hundred per year...but the YDI is an order of magnitude better, only 3 or 4 breaks per hundred kilometres per year.

© Roy Brander, P.Eng 2003