gray iron


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Related to gray iron: alloy cast iron, Ductile iron

gray iron

[′grā ‚ī·ərn]
(metallurgy)
Pig or cast iron in which the carbon not contained in pearlite is present in the form of graphitic carbon.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
By industry branch, the union proportion was about one-half of the workers in gray iron pipe and fittings and steel foundries; three-fourths in gray iron foundries, except pipe and fittings; and nine-tenths in malleable iron foundries.
In gray iron, the graphite exists as flakes, whereas the graphite in the imbedded flake matrix of graphite often traps and binds corrosion poducts in place.
Circa 1950, when ductile iron came on the scene at twice the strength of cast gray iron, there suddenly was less general interest in making high-strength gray iron.
The microstructure of the CGI material is such that there aren't the stress risers and fault lines associated with gray iron, nor are there the thermal requirements characteristic of machining nodular iron.
Seventy percent of the country's casting production is gray iron for use in the sugar mill, automotive, agriculture, cement and chemical industries.
A continued loss to imports from Eastern Europe is probable, along with gray iron conversions to ductile iron.
The West Allis facility is an automatic green sand gray iron plant employing 22 salaried and approximately 90 hourly workers.
China continues to produce ingot molds in quantity for blast furnaces, and gray iron pipe has not been replaced by ductile iron, malleable iron and steel.
Peak production of medium to heavy trucks and freight cars spurred increases in shipments of ferrous castings, but lowering production in these market sectors is forecast to result in declines in gray iron and steel castings through 2008 of 1.7% and 11.4%.
For gray iron G3000, we have tensile results of 31 ksi to 34 ksi.