MODULUS METAL | ALUMINUM SAND CASTING FOUNDRY IN TURKEY General Information Table Category Description 1xx.x Series Pure aluminum 2xx.x Series Copper-alloyed 3xx.x Series Silicon, copper, and magnesium alloyed 4xx.x Series Silicon-alloyed 5xx.x Series Magnesium-alloyed 6xx.x Series Unused (reasons for non-use explained separately) 7xx.x Series Zinc-alloyed 6xx.x: series is unused. ( Why is the 6xx.x series … Continue reading Cast Aluminum Alloys: An Overview