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3203 Aluminum vs. ASTM A302 Alloy Steel

3203 aluminum belongs to the aluminum alloys classification, while ASTM A302 alloy 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 3203 aluminum and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
190
Elongation at Break, % 4.5 to 29
20 to 23
Fatigue Strength, MPa 46 to 92
250 to 280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
73
Shear Strength, MPa 72 to 120
370 to 390
Tensile Strength: Ultimate (UTS), MPa 110 to 200
590 to 620
Tensile Strength: Yield (Proof), MPa 39 to 190
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 400
250
Maximum Temperature: Mechanical, °C 180
410
Melting Completion (Liquidus), °C 650
1460
Melting Onset (Solidus), °C 620
1420
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 170
39 to 51
Thermal Expansion, µm/m-K 23
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 140
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
2.4 to 3.0
Density, g/cm3 2.8
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 8.1
1.5 to 1.6
Embodied Energy, MJ/kg 150
20 to 21
Embodied Water, L/kg 1180
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 8.0 to 25
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 11 to 250
330 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
24
Strength to Weight: Axial, points 11 to 20
21 to 22
Strength to Weight: Bending, points 19 to 28
20 to 21
Thermal Diffusivity, mm2/s 70
10 to 14
Thermal Shock Resistance, points 4.9 to 8.8
17 to 18