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Gray, ductile, and austempered ductile iron castings up to 250lbs.
ASTM A536, SAE J434, ASTM A48, SAE J431

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green sand
Many of us know what a pattern is. But do you know the process that goes into making that pattern into a mold? Well, the process has been streamlined a bit, thanks to two high-capacity automated molding lines at Northern Iron and Machine.  Those lines both produce green sand molds using a pattern, a flask...
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