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gray iron

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gray iron [′grā ‚īยทərn]
(metallurgy)
Pig or cast iron in which the carbon not contained in pearlite is present in the form of graphitic carbon.


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Gray Iron--Unlike ductile iron, gray iron bars are usually poured at the beginning of the pour.
Essentially, there are three types of iron associated with engine blocks: * Gray iron * Nodular iron * CGI Each of these, because of their physical makeup at the microstructure scale, has different machining characteristics.
For example, in the gray iron pipe and fittings foundries, these pay advantages were reversed-average earnings were higher in firms that were nonunion, smaller in size (20-249 workers), or in commercial foundries.
 
 
 
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