GOST 2685-75 divides aluminum casting alloys into five distinct metallurgical groups depending on their primary alloying systems: Group I: Aluminum-Silicon Alloys (Silumins) АК12 (АЛ2), АК9 (АЛ4), АК7 (АЛ9)
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
To ensure compliance with the technical requirements, GOST 2685-75 outlines specific testing methodologies. These include procedures for evaluating the alloy's mechanical properties, its microstructure, and its ability to withstand various environmental conditions. For instance, the heat resistance of these alloys is defined, with many capable of operating at temperatures up to 200 °C. GOST 2685-75 divides aluminum casting alloys into five
: Defines standard codes (e.g., T1, T4, T6) for aging and annealing processes. 📂 Where to Find the PDF For instance, the heat resistance of these alloys
Verification of chemical composition using spectral analysis.