6063 aluminum rods are the only Al-Mg-Si alloys for which no stress corrosion cracking has been detected in heat-treatable aluminium alloys. However, quenching can adversely affect strength if left at room temperature for a period of time before ageing (parking effect).
The hardness of 6063 aluminum bars can vary depending on the treatment.
Generally, the hardness of 6063 aluminum alloy ranges from about 75-120 HB. if heat treated, Rockwell hardness may reach 20-40 HRB or 40-60 HRC. in addition, if the aluminium alloy is strengthened by cold working, the hardness may be even higher due to the effects of cold work hardening.
Often used in construction profiles, irrigation tubing, extrusions for vehicles, pedestals, furniture, lifts, railings, etc., and decorative components of different colours for aircraft, ships, light industrial sectors, buildings, etc.




Shandong Ruitong New Materials Co., Ltd. is a leading supplier of steel and other metal products in China. As an ISO9001:2015 certified company, our products comply with ASTM, AISI, BS, DIN, JIS and other standards.