Aluminum alloys 6061 and 6063 are two of the most commonly used aluminum alloys for extruded profiles. While they have many similarities, there are some key differences between the two.
Chemical Composition: Aluminum 6061 contains higher amounts of magnesium and silicon than 6063, while 6063 contains higher amounts of aluminum and zinc. This difference in composition gives 6061 better strength and corrosion resistance properties, while 6063 has better formability and surface finish properties.
Strength: Aluminum 6061 is stronger than 6063, with a tensile strength of 45,000 psi versus 30,000 psi for 6063. This makes 6061 a better choice for structural applications that require higher strength.
Formability: Aluminum 6063 is more easily formed than 6061, with better extrusion characteristics and surface finish. This makes it a popular choice for architectural applications where appearance is important.
Weldability: Aluminum 6061 has better weldability than 6063, due to its higher magnesium content. This makes it a better choice for applications where welding is required.
Machinability: Aluminum 6061 is easier to machine than 6063, due to its higher strength and hardness. This makes it a good choice for applications where machining is required.
Cost: Aluminum 6063 is generally less expensive than 6061, due to its lower strength and hardness.
Overall, the choice between aluminum 6061 and 6063 will depend on the specific application requirements, with 6061 being a better choice for structural applications, and 6063 being a better choice for applications where formability and surface finish are important.
