GOST 2685-75 is a critical interstate standard that specifies the requirements for aluminum casting alloys
: E.g., AK7ch. High strength after heat treatment. gost 2685-75 pdf
The standard classifies alloys based on their primary alloying elements (e.g., Al-Si, Al-Cu, Al-Mg). Common grades referenced under this standard include: AL4 (АЛ4): GOST 2685-75 is a critical interstate standard that