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6063-T6 Aluminum

6063-T6 aluminum is a type of 6063 aluminum. It is furnished in the T6 temper. To achieve this temper, the metal is solution heat-treated and artificially aged until it meets standard mechanical property requirements.

Mechanical Properties

Graph bars compare 6063-T6 aluminum to other aluminum alloys (top) and the entire database (bottom).

Brinell Hardness


Elastic (Young's, Tensile) Modulus

71 GPa 10 x 106 psi

Elongation at Break

11 %

Fatigue Strength (Endurance Limit)

70 MPa 10 x 103 psi

Modulus of Resilience (Unit Resilience)

320 kJ/m3

Poisson's Ratio


Shear Modulus

26 GPa 3.8 x 106 psi

Shear Strength

150 MPa 22 x 103 psi

Strength to Weight Ratio

90 kN-m/kg

Tensile Strength: Ultimate (UTS)

250 MPa 36 x 103 psi

Tensile Strength: Yield (Proof)

210 MPa 31 x 103 psi

Unit Rupture Work (Ultimate Resilience)

25 MJ/m3

Thermal Properties

Melting Onset (Solidus)

620 °C 1140 °F

Specific Heat Capacity

900 J/kg-K 0.22 BTU/lb-°F

Thermal Conductivity

200 W/m-K 120 BTU/h-ft-°F

Thermal Diffusivity

82 m2/s

Thermal Expansion

22 µm/m-K

Other Material Properties

Base Metal Price

16 % relative

Calomel Potential

-740 mV


2.7 g/cm3 170 lb/ft3

Electrical Conductivity: Equal Volume

53 % IACS

Electrical Conductivity: Equal Weight (Specific)

170 % IACS

Electrical Resistivity Order of Magnitude

-7.0 10x Ω-m

Embodied Carbon

8.3 kg CO2/kg material

Embodied Energy

150 MJ/kg 66 x 103 BTU/lb

Embodied Water

1190 L/kg 140 gal/lb

Alloy Composition

Aluminum (Al) 97.5 to 99.4
Magnesium (Mg) 0.45 to 0.9
Silicon (Si) 0.2 to 0.6
Iron (Fe) 0 to 0.35
Manganese (Mn) 0 to 0.1
Chromium (Cr) 0 to 0.1
Titanium (Ti) 0 to 0.1
Zinc (Zn) 0 to 0.1
Copper (Cu) 0 to 0.1
Residuals 0 to 0.15

All values are % weight. Ranges represent what is permitted under applicable standards.

Followup Questions

Further Reading

Aluminum Standards and Data, Aluminum Association Inc., 2013

ASTM B210: Standard Specification for Aluminum and Aluminum-Alloy Drawn Seamless Tubes

ASTM B221: Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles, and Tubes

ASTM B483: Standard Specification for Aluminum and Aluminum-Alloy Drawn Tube and Pipe for General Purpose Applications

EN 754-2: Aluminium and aluminium alloys. Cold drawn rod/bar and tube. Mechanical properties

EN 755-2: Aluminium and aluminium alloys. Extruded rod/bar, tube and profiles. Mechanical properties

ISO 6361: Wrought Aluminium and Aluminium Alloy Sheets, Strips and Plates