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6066 Aluminum vs. ASTM A266 Carbon Steel

6066 aluminum belongs to the aluminum alloys classification, while ASTM A266 carbon steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 6066 aluminum and the bottom bar is ASTM A266 carbon steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 7.8 to 17
21 to 26
Fatigue Strength, MPa 94 to 130
170 to 200
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 95 to 240
320 to 380
Tensile Strength: Ultimate (UTS), MPa 160 to 400
500 to 600
Tensile Strength: Yield (Proof), MPa 93 to 360
230 to 290

Thermal Properties

Latent Heat of Fusion, J/g 410
250
Maximum Temperature: Mechanical, °C 170
400
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 890
470
Thermal Conductivity, W/m-K 150
51 to 52
Thermal Expansion, µm/m-K 23
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 130
8.1 to 8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 2.8
7.8
Embodied Carbon, kg CO2/kg material 8.3
1.4
Embodied Energy, MJ/kg 150
18 to 19
Embodied Water, L/kg 1160
46 to 47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 52
110
Resilience: Unit (Modulus of Resilience), kJ/m3 61 to 920
140 to 230
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 16 to 39
18 to 21
Strength to Weight: Bending, points 23 to 43
18 to 20
Thermal Diffusivity, mm2/s 61
14
Thermal Shock Resistance, points 6.9 to 17
16 to 19