General Information Casting Loading Materials Aluminum Ingot Adding of a Refining Agent Al. Si Mother Alloy Magnesium Melting Furnace Holding Furnace Molten Metal Treatment Continuous Homogenizing Furnace Continuous Hot Top Casting Machine Data Collection for Analysis Spectro-analysis In order to produce high-quality aluminum extrusions, one starts by making good aluminum alloys. At the moment the most widely used type of aluminum alloy for extruded shapes is 6063. This is an alloy where a small amount of magnesium and silicon has been added to the aluminum. This alloy is highly anticorrosive, easily extruded, and also provides a good surface treatment effect. We at YKK AP have been making this alloy since 1959. Although we have processed this alloy for a long time, we analyze the quality of each lot we produce by checking the contents of the components that will be added to the alloy. This is why our products never lose their top quality. Page-6 GI-1000-04 | Effective Date: August 23, 2018