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ASTM A302 Alloy Steel vs. 201.0 Aluminum

ASTM A302 alloy steel belongs to the iron alloys classification, while 201.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 ASTM A302 alloy steel and the bottom bar is 201.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
95 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 20 to 23
4.4 to 20
Fatigue Strength, MPa 250 to 280
120 to 150
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Shear Strength, MPa 370 to 390
290
Tensile Strength: Ultimate (UTS), MPa 590 to 620
370 to 470
Tensile Strength: Yield (Proof), MPa 350 to 390
220 to 400

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 410
170
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
570
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 39 to 51
120
Thermal Expansion, µm/m-K 13
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
30 to 33
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
87 to 97

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
38
Density, g/cm3 7.8 to 7.9
3.1
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
8.7
Embodied Energy, MJ/kg 20 to 21
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
19 to 63
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
330 to 1160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 21 to 22
33 to 42
Strength to Weight: Bending, points 20 to 21
37 to 44
Thermal Diffusivity, mm2/s 10 to 14
45
Thermal Shock Resistance, points 17 to 18
19 to 25