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6061-T6 Aluminum vs. 6063-T5 Aluminum

Both 6061-T6 aluminum and 6063-T5 aluminum are aluminum alloys. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is 6061-T6 aluminum and the bottom bar is 6063-T5 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 93
60
Elastic (Young's, Tensile) Modulus, GPa 69
68
Elongation at Break, % 10
11
Fatigue Strength, MPa 96
70
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 210
120
Tensile Strength: Ultimate (UTS), MPa 310
180
Tensile Strength: Yield (Proof), MPa 270
140

Thermal Properties

Latent Heat of Fusion, J/g 400
400
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 650
650
Melting Onset (Solidus), °C 580
620
Specific Heat Capacity, J/kg-K 900
900
Thermal Conductivity, W/m-K 170
210
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
55
Electrical Conductivity: Equal Weight (Specific), % IACS 140
180

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Calomel Potential, mV -740
-740
Density, g/cm3 2.7
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 30
17
Resilience: Unit (Modulus of Resilience), kJ/m3 520
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
50
Strength to Weight: Axial, points 31
18
Strength to Weight: Bending, points 37
26
Thermal Diffusivity, m2/s 68
86
Thermal Shock Resistance, points 14
8.0

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
97.5 to 99.4
Chromium (Cr), % 0.040 to 0.35
0 to 0.1
Copper (Cu), % 0.15 to 0.4
0 to 0.1
Iron (Fe), % 0 to 0.7
0 to 0.35
Magnesium (Mg), % 0.8 to 1.2
0.45 to 0.9
Manganese (Mn), % 0 to 0.15
0 to 0.1
Silicon (Si), % 0.4 to 0.8
0.2 to 0.6
Titanium (Ti), % 0 to 0.15
0 to 0.1
Zinc (Zn), % 0 to 0.25
0 to 0.1
Residuals, % 0 to 0.15
0 to 0.15