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242.0 Aluminum vs. ASTM A302 Alloy Steel

242.0 aluminum belongs to the aluminum alloys classification, while ASTM A302 alloy steel belongs to the iron alloys. There are 31 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 242.0 aluminum and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 70 to 110
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 73
190
Elongation at Break, % 0.5 to 1.5
20 to 23
Fatigue Strength, MPa 55 to 110
250 to 280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Shear Strength, MPa 150 to 240
370 to 390
Tensile Strength: Ultimate (UTS), MPa 180 to 290
590 to 620
Tensile Strength: Yield (Proof), MPa 120 to 220
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 210
410
Melting Completion (Liquidus), °C 640
1460
Melting Onset (Solidus), °C 530
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 130 to 170
39 to 51
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33 to 44
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 96 to 130
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
2.4 to 3.0
Density, g/cm3 3.1
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 8.3
1.5 to 1.6
Embodied Energy, MJ/kg 150
20 to 21
Embodied Water, L/kg 1130
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 1.3 to 3.4
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 340
330 to 410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
24
Strength to Weight: Axial, points 16 to 26
21 to 22
Strength to Weight: Bending, points 23 to 32
20 to 21
Thermal Diffusivity, mm2/s 50 to 62
10 to 14
Thermal Shock Resistance, points 8.0 to 13
17 to 18