These provide the highest corrosion resistance, especially in marine environments, along with good weldability.
Lena handed over the photocopy she had made from her handwritten notebook. Frau Bauer examined it page by page, pausing at Section 7.2.3.
The standard defines the mechanical properties required for each alloy, including tensile strength (( \sigma_B )), yield strength (( \sigma_0.2 )), and elongation (( \delta )), which are essential for engineering design. These properties vary depending on the alloy type and the casting method employed.
: Allowed percentages of aluminum, silicon, magnesium, etc., for each grade. Mechanical Properties gost 2685-75 pdf
Components cast under the guidelines of GOST 2685-75 are found across heavy industries due to their high strength-to-weight ratio:
GOST 2685-75 categorizes aluminum casting alloys into five distinct groups based on their primary alloying elements:
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.) The standard defines the mechanical properties required for
Internal combustion engine components and structural brackets. Group III: Aluminum-Copper Alloys Common Grades: АМ5 (АЛ7), АМ4.5Кд (АЛ19)
GOST 2685-75 categorizes aluminum casting alloys based on their primary alloying elements and chemical behavior. The standard defines:
While the standard originated in 1975, it has seen various revisions and updates over the decades, often superseded or supplemented by newer iterations like GOST 2685-97. However, many engineering blueprints and legacy manufacturing pipelines still specifically reference the 1975 version. Chemical Composition and Classifications including tensile strength (( \sigma_B ))
The GOST 2685-75 standard covers aluminum alloys intended for the production of shaped castings. It classifies alloys based on their chemical composition and the specific casting method used, such as:
In the dimly lit archives of a forgotten Soviet design bureau,