Galvanizing - Applying a coating of zinc to finished cold-reduced sheet or to fabricated parts made from strip products. Application may be by hot dip (either hand or continuous) or electrolysis.
Galvannealing - Applying an extra light coat of zinc to a soft steel sheet, then passing through an oven at about 1200°F (650°C). Gives a dull gray unspangled coat well suited for painting.
Grain Structure - The type of crystalline structure as observed by eye or under the microscope.
Graphitizing - Annealing gray cast iron so that most of the carbon is transformed to the graphitic condition. Controlled by increasing silicon and by thermal treatment.