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6063A Aluminum vs. ASTM A204 Steel

6063A aluminum belongs to the aluminum alloys classification, while ASTM A204 steel belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 6063A aluminum and the bottom bar is ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
190
Elongation at Break, % 6.7 to 18
18 to 22
Fatigue Strength, MPa 53 to 80
200 to 220
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 78 to 150
330 to 360
Tensile Strength: Ultimate (UTS), MPa 130 to 260
520 to 590
Tensile Strength: Yield (Proof), MPa 55 to 200
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 160
410
Melting Completion (Liquidus), °C 640
1470
Melting Onset (Solidus), °C 620
1420 to 1430
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 200
52
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 49 to 54
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 160 to 180
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 8.3
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1190
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 21
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 22 to 280
220 to 290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 13 to 26
18 to 21
Strength to Weight: Bending, points 21 to 33
18 to 20
Thermal Diffusivity, mm2/s 83
14
Thermal Shock Resistance, points 5.6 to 11
15 to 17