Ductile iron is an alloy of iron, carbon and silicon which refers to a range of cast irons which solidify with a eutectic where the form of the graphite has been modified to spheres from the flakes of a normal cast iron.uctile Cast Iron. Despite this, the principles of ductile iron solidification are understood from the binary iron-carbon phase diagram, where the eutectic point lies at 1154Â°C and 4.3 wt% carbon. A few of the terms used to describe cast iron and its constituents are:-.
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A service definition is used to identify a service that runs on a host. The term service is used very loosely. It can mean an actual service that runs on the host (POP, SMTP, HTTP, etc.) or some other type of metric associated with the host (response to a ping, number of logged in users, free disk space, etc.).