Factors affecting the size of aluminum profile（三）

Extruded metal material

1. Fluidity of the extruded metal

2. Segregation tendency of extruded metal (uneven distribution of chemical composition in each part within the same ingot)

3. Shrinkage of the extruded metal (usually Al-6063 takes 1% of the unnatural shrinkage, linear shrinkage)

4. Casting stress and crack tendency of extruded metal

5. Tendency to form looseness and stomata