Solution heat treatment followed by full artificial aging to achieve maximum tensile strength. Evolution and the Transition to GOST 2685-93
The 1993 version shifted toward the AK (Aluminum-Silicon) and AMg (Aluminum-Magnesium) nomenclature, aligning closely with international standards. For example, the legacy grade AL4 was cross-referenced and adapted into AK9ch .
The standard includes aluminum alloys such as AЛ-4 (AL-4).
Typical alloys defined under this standard, such as or AL8 , are graded based on their tensile strength ( σBsigma sub cap B ) and hardness (HB). Alloy Grade Tensile Strength ( σBsigma sub cap B Elongation ( Brinell Hardness (HB) AL6 AL8 gost 2685-75 pdf
Although GOST 2685-75 is a superseded standard, it remains a valuable historical document. Its detailed classification of aluminum casting alloys, with specific chemical compositions and mechanical properties, laid the groundwork for modern standards like . While not suitable for new projects, it serves as an important reference for understanding the evolution of material science in the former Soviet Union. For current applications, always refer to the latest valid version of GOST 1583 .
The standard "ГОСТ 2685-75 Сплавы алюминиевые литейные. Марки" is often accessed for engineering drawings and quality verification.
This is because millions of tons of legacy industrial machinery, aerospace components, automotive parts, and military hardware were manufactured strictly according to the 1975 revisions. Understanding this specific standard is critical for cross-referencing materials, executing reverse-engineering projects, and sourcing modern equivalents like ISO, EN, or ASTM alloys. Technical Overview of GOST 2685-75 Solution heat treatment followed by full artificial aging
, it remains a critical reference for legacy industrial designs, mechanical engineering drawings, and historical metallurgical data. Russian Gost Core Content of the Standard
The GOST 2685-75 PDF document covers a wide range of topics related to metal cutting tools, including:
It is very important to be aware that GOST 2685-75 is an older, superceded standard . It was officially replaced by GOST 1583-89 (Aluminum Casting Alloys. Technical Conditions) starting from January 1, 1990 . Consequently, it should not be used for any new design, manufacturing, or certification projects. Instead, GOST 1583-93 and its successors are the valid standards for current technical regulation. The standard includes aluminum alloys such as AЛ-4 (AL-4)
High-purity alloy, excellent for corrosion resistance and welding.
Offers free viewing and downloading of historical and active GOST standards.
For legal manufacturing or export certification, a free PDF is insufficient. Auditors will require a traceable, purchased copy.
If you are working on a specific engineering or restoration project, let me know which or casting method you are analyzing so we can cross-reference its exact modern chemical equivalent. Share public link
: Covers common cast aluminum alloys such as AL4 (АЛ4) , AL9 (АЛ9) , and AL19 (АЛ19) . Technical Requirements :