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This research is based on statistical research methodology to evaluate variation in casting surface finish in nonfer­rous production operations.

The Data Base of 82 cast surface finish measurements were produced in three U.S. foundries. The data base is comprised of two sub-groups. One data sub-group has a sample size of 58 aluminum cast surfaces. The second data sub-group consists of 24 cast bronze surface finishes.

Existence of research evidence correlating sand-grain finish with cast surface finish is compatible with the range of 60 to 300 AFS grain-finish sand mixtures used in the experiment. Further research evidence correlating alloy-hydraulic pressure with casting finish is addressed with use of pressure heads ranging from 0.2925 lbs. per sq. in. to 3.0586 lbs. per sq. in.

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