AA 6063-T6 is an aluminium alloy, with magnesium and silicon as the alloying elements. The standard controlling its composition is maintained by The Aluminum Association. It has generally good mechanical properties and is heat treatable and weldable.  It is NOT recommended to weld anodized aluminum.

Tensile strength (σ_t): 30,000 psi

Density (ρ): 0.10 lbs/in³

Melting temperature (T_m): 615 °C (1,139 °F)

Thermal conductivity (k): 201-218 W/m*K

Linear thermal expansion coefficient (α): 2.34*10⁻⁵ K⁻¹

Young’s modulus (E): 10,000,000.lbs / in²

Flatness: 0.004” x width of profile.

Straightness: 0.01” x length of profile