: Covers common cast aluminum alloys such as AL4 (АЛ4) , AL9 (АЛ9) , and AL19 (АЛ19) . Technical Requirements :
Hardening (solution heat treatment) without artificial aging. Т5 (T5): Hardening followed by partial artificial aging.
When downloading an official scan or archival version of the standard via online databases, the document details strict industrial protocols:
GOST 2685-75 classifies aluminum casting alloys into distinct groups based on their primary alloying elements. These structural groupings determine the material's final mechanical behavior and chemical resistance. Primary Alloy Groups gost 2685-75 pdf
A silumin modified with magnesium and manganese, offering an optimal balance of strength and ductility.
Inside were forty-three typewritten pages, stapled in three places, with handwritten corrections in blue ink from 1975. The title page read: GOST 2685-75. Effective: January 1, 1976. Replaces GOST 2685-63.
Engineers often rely on the, "Laterial substitute is aluminum AЛ-4, гOCT 2685-75" clause, which indicates the high compatibility of these materials with modern casting techniques. : Covers common cast aluminum alloys such as
(e.g., T2 condition) to achieve specific structural properties. Industry Use
| | 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 |
A popular casting alloy used for complex, pressurized parts requiring high strength. When downloading an official scan or archival version
The GOST 2685-75 standard remains a critical touchstone for industrial archaeology, military-industrial maintenance, and the global manufacturing supply chain. If you are downloading a , ensure that your copy includes the complete annexes detailing the permissible impurity levels (such as iron and iron-to-manganese ratios), as these impurities heavily influence the brittle nature of the cast parts.
Complex instrument housings, thin-walled airtight parts, pump bodies. AL3, AL5, AL5-1, AL6, AL32