While dimensional boundaries may match, internal design features (e.g., ball complement, cage material) differ. A bearing stamped "GOST 2685-75" is not always mechanically identical to an ABEC 7 bearing of the same boundary dimensions.
The standard text and PDFs are available from national standards distributors and archival collections of GOST documents; newer consolidated standards (replacements) are published separately. (Search for "ГОСТ 2685-75 PDF" or the replacement "ГОСТ 1583-89" at standards libraries or authorized publishers.)
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GOST 2685-75 is the primary interstate standard (CIS/ex-USSR) governing foundry aluminum alloys
. It provides the technical framework for the grades, chemical composition, and testing methods of aluminum alloys used for casting. Normacs.net Overview of GOST 2685-75 gost 2685-75 pdf
This standard applies to aluminum alloys intended for the manufacture of castings by various methods, such as sand casting, chill casting, and die casting. Official Title:
Casting aluminum alloys. Grades, technical requirements, and test methods.
Originally established by the USSR State Committee for Standards (Gosstandart).
It specifies the chemical constituents, mechanical properties (like hardness and tensile strength), and heat treatment regimes for different aluminum grades. GeM marketplace Key Specifications & Grade Examples such as sand casting
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):
Often used in aerospace and automotive components due to its strength and casting properties. AL2 (АЛ2): A widely used grade for general engineering purposes. Government e-Marketplace Content of the Standard
If you are looking for the full text in a PDF format, the document typically includes: Chemical Composition Tables:
Precise percentages of aluminum, silicon, copper, magnesium, and other elements for each grade. Mechanical Properties: While dimensional boundaries may match
Requirements for tensile strength, elongation, and Brinell hardness. Heat Treatment Regimes:
Instructions for processes like annealing, quenching, and aging (often denoted by codes like T1, T2, T6). Testing Methods:
Standardized procedures to ensure the quality of the casting. GeM marketplace Common International Equivalents
In many engineering contexts, GOST 2685-75 grades are matched with international standards such as: (Indian Standard).
(International Organization for Standardization) for aluminum casting alloys. ASTM B26/B108 (American standards for sand and chill casting). GeM marketplace
Standard Designation: GOST 2685-75 Title: Magnesium casting alloys. Grades Status: Interstate Standard (CIS) Applicability: Metallurgy, Aerospace Engineering, Automotive Industry