Gost 2685-75 Pdf | 2026 Edition |
) of at least 147 MPa and a Brinell hardness of 45 MPa. It is primarily composed of aluminum with 4.5–6% Silicon and 2–3% Copper.
), and Brinell hardness (HB) ranges, utilizing standard specimen testing methods later synchronized under GOST 1497-84. 🛠️ Why Professionals Still Need the GOST 2685-75 PDF
Highly corrosive environments, shipbuilding, and chemical processing. Aluminum–Other Components Special-purpose alloys (АК7Ц9 / АЛ11)
Includes more complex systems where aluminum is alloyed with other elements for specialized applications. gost 2685-75 pdf
: General-purpose castings where high strength is not the primary requirement. 4. AL7 / AL3 (AЛ7 / AЛ3) System : Al-Cu
The Rosstandart (Federal Agency for Technical Regulation) website is the primary official source.
However, it is not a tutorial; it is a specification sheet. If you do not have a background in metallurgy, the tables will be difficult to interpret. For the professional, it is a 5-star reference document. For the hobbyist, it is a confusing list of numbers. ) of at least 147 MPa and a Brinell hardness of 45 MPa
A2: GOST 1583-89 is the direct successor to GOST 2685-75. While GOST 1583-89 covers similar aluminum casting alloys, it includes updates to alloy grades, updated chemical composition requirements, and revised mechanical property thresholds to reflect advancements in metallurgy.
: Higher strength compared to silumins, used for high-load components.
A: The standard recognized that different casting technologies—such as sand casting or pressure die casting—impose different requirements on the alloy's fluidity and tendency to form brittle intermetallic phases. Therefore, strict but method-specific limits were set for iron content. 🛠️ Why Professionals Still Need the GOST 2685-75
| | Max. Permitted Iron (Fe) Content | Max. Total Impurities | | :--- | :--- | :--- | | Sand/Shell Molds | ≤ 1.00% | ≤ 1.70% | | Chill Molds | ≤ 1.40% | ≤ 1.90% | | Injection Molding | ≤ 1.50% | ≤ 2.10% |
The standard provides a comprehensive framework for the production and inspection of aluminum alloys, specifically covering: Alloy Designations