Terms & Definitions


Metal Technologies has compiled a small glossary to help you familiarize yourself with the language of metal casting. Please select a range of terms from the menu at the left for listings of common metal casting terms and definitions.

Gate: A channel through which the molten metal enters the casting cavity.  


Gating System: The complete arrangement of gates, runners, and sprues through which molten metal flows into the cavity of the mold.  


Gaggers: Metal supports shaped like the letter "L" that are used to reinforce the sand in the mold.  


Gray Iron: Iron in which a large percentage of the carbon content is in the form of graphite flakes. The graphite flakes cause it to have low shock resistance, but high damping ability. It has a gray fracture. Gray Iron is by far the oldest and most common form of cast iron. As a result, it is assumed by many to be the only form of cast iron and the terms "cast iron" and "gray iron" are used interchangeably.  More about Gray Iron


Green Sand: Natural sands combined with water and organic additives (such as clay) to proper consistency for creating molds.  


Green-sand Core: A core that is made of molding sand but not baked.  
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