Self-aging properties, meaning they achieve high strength without requiring complex thermal treatment. Applications: Large structural components w Heat Treatment Designations in GOST 2685-75
: For example, it specifies that the total allowable impurities for sand and shell molding should generally not exceed .
Mechanical properties were also a critical part of GOST 2685-75. The table below shows values for certain alloys as specified in the standard:
As of current industry practices, GOST 2685-75 is considered and has been officially superseded.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 GOST 2685-75 (Legacy) Modern Equivalent (e.g., GOST 1583-89) Status Superseded/Not Effective Active/Current Primary Use Legacy parts, historical reference New designs, modern manufacturing Availability Digital Archives (PDF) Standard regulatory libraries Obtaining the Document gost 2685-75 pdf
| | Fe (%) | Si (%) | Mg (%) | Cu (%) | Zn (%) | Ni (%) | Al (%) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | AL1 (GOST 2685-75) | < 0.8 | < 0.7 | 1.25–1.75 | 3.75–4.5 | < 0.1 | 1.75–2.25 | 90.1–93.25 | | AL6 (GOST 2685-75) | ≤ 1.1 | 4.5–6 | ≤ 0.1 | 2–3 | ≤ 0.3 | - | Rest | | AL8 (GOST 2685-75) | ≤ 0.3 | ≤ 0.3 | 9.3–10 | ≤ 0.1 | ≤ 0.1 | - | Rest |
GOST 2685-75 is a state standard approved by the USSR State Committee for Standards (Gosstandart). It was officially introduced on January 1, 1977, following the decree No. 2908 dated November 14, 1975. The standard focuses on aluminum casting alloys intended for the production of shaped castings. It covers everything from alloy grades and chemical composition to technical requirements and testing methods.
This standard defines the requirements for cast non-ferrous aluminum alloys, specifically for casting components. The table below shows values for certain alloys
Solution heat treatment followed by partial artificial aging for balanced strength.
If you are ready to secure your copy, visit the official Rosstandart e-shop or your national standards body’s website. Search for code “GOST 2685-75” and select the digital PDF option. Ensure you also download any official amendments to stay fully compliant.
Understanding GOST 2685-75: The Standard for Aluminum Casting Alloys It was officially introduced on January 1, 1977,
A1: No, GOST 2685-75 is superseded. For modern production, you must refer to the current replacement standard GOST 1583-93 to ensure compliance with contemporary safety and quality regulations.
Used for structural castings requiring pressure tightness. AL9: Used for high-strength casting parts.
Since the standard is officially "not effective" (superseded), digital copies are primarily available through historical regulatory archives: RussianGost|Official Regulatory Library - GOST 2685-75