: Many AL-Si alloys (like AL4 and AL9) are often modified (e.g., with Sodium) to refine the structure, which increases strength by up to
| Alloy Grade | Heat Treatment | Tensile Strength ($\sigma_B$, MPa) | Elongation ($\delta_5$, %) | Brinell Hardness (HB) | | :--- | :--- | :--- | :--- | :--- | | | T6 (Quench + Age) | 225 – 240 | 3 – 5 | 60 – 65 | | ML10 | T6 | 230 – 260 | 3 – 6 | 60 – 70 | | ML12 | T1 (Artificial Aging) | 210 – 250 | 3 – 5 | 55 – 65 |
Note: The table below represents approximate minimum values for Sand Casting (S).
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. gost 2685-75 pdf
Full PDF versions of the standard are often archived in official regulatory libraries. You can find detailed metadata or purchase access through the RussianGost Official Regulatory Library or view status information on NormaCS . RussianGost|Official Regulatory Library - GOST 2685-75
You can locate the official technical specifications through technical documentation suppliers, such as Scribd's Metallic Materials Specification guide .
The Document is Replaced With: * GOST 1583-89: Aluminium casting alloys. Specifications. * GOST 2685-63: Aluminium casting alloys. auremo.biz Alloy АЛ6 - Auremo : Many AL-Si alloys (like AL4 and AL9) are often modified (e
: General-purpose castings where high strength is not the primary requirement. 4. AL7 / AL3 (AЛ7 / AЛ3) System : Al-Cu
Since GOST standards are official state documents from the USSR/Russia, they are widely archived. You can find them through the following methods: :
A bearing per GOST 2685-75 is roughly equivalent to an ISO P4 (high precision). However, Class 2 in the GOST system is tighter than ISO P2 in certain runout parameters. Do not substitute without a cross-reference table. Full PDF versions of the standard are often
Requirements for tensile strength, elongation, and Brinell hardness. Heat Treatment Regimes:
Components cast according to GOST 2685-75 standards are used across various sectors, including, but not limited to:
This GOST standard specifies the requirements for aluminum casting alloys, including:
Enhanced strength and machinability at elevated temperatures. Ideal for internal combustion engine blocks. AL7, AL19, AL33
Warning: You will find dozens of websites offering a "free gost 2685-75 pdf download." However, many of these are: