Series 5 / 6 / 7 will be used in CNC processing, according to the properties of the alloy series.

   5 series alloys are mainly 5052 and 5083, with the advantages of low internal stress and low shape variable.

   6 series alloys are mainly 6061,6063 and 6082, which are mainly cost-effective, higher hardness than 5 series and lower internal stress than 7 series.

   7 series alloy is mainly 7075, characterized by high hardness, but large internal stress and great difficulty in processing.