: Used for high-precision components.
: Known for higher magnesium content (9.3–10%), this grade offers improved mechanical properties, which can be further enhanced by 15–20% if iron and silicon impurities are limited to 0.030%. gost 2685-75 pdf
As of current industry practices, GOST 2685-75 is considered and has been officially superseded. The primary replacement for general aluminum casting specifications is GOST 1583-89 . GOST 2685-75 (Legacy) Modern Equivalent (e.g., GOST 1583-89) Status Superseded/Not Effective Active/Current Primary Use Legacy parts, historical reference New designs, modern manufacturing Availability Digital Archives (PDF) Standard regulatory libraries Obtaining the Document : Used for high-precision components
Engineers and researchers requiring the exact technical tables or heat treatment regimes (such as the T2 condition) can find digital copies of GOST 2685-75 PDF through official regulatory libraries and document suppliers like RussianGost. Russian Gost RussianGost|Official Regulatory Library - GOST 2685-75 Standard Status and Modern Alternatives : Specific impurity
: Frequently used as a substitute in various mechanical designs and brackets. Standard Status and Modern Alternatives
: Specific impurity limits, such as iron content, are strictly defined for these methods.
: A medium-strength alloy often used for shaped castings. It typically features a tensile strength ( σBsigma sub cap B