Understanding GOST 2685-75: The Standard for Aluminum Casting Alloys
: Outlines performance expectations for different techniques: Sand and Shell Molds : Often used for large, complex parts. Investment Casting : Used for high-precision models. gost 2685-75 pdf
The PDF mandates that the internal and external surfaces must be free from cracks, scabs, and delamination. Tests required include hydrostatic pressure tests, flattening tests, and non-destructive flaw detection. and non-destructive flaw detection.