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ASTM A302 Alloy Steel vs. 224.0 Aluminum

ASTM A302 alloy steel belongs to the iron alloys classification, while 224.0 aluminum belongs to the aluminum alloys. There are 29 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 ASTM A302 alloy steel and the bottom bar is 224.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
71
Elongation at Break, % 20 to 23
4.0 to 10
Fatigue Strength, MPa 250 to 280
86 to 120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 73
27
Tensile Strength: Ultimate (UTS), MPa 590 to 620
380 to 420
Tensile Strength: Yield (Proof), MPa 350 to 390
280 to 330

Thermal Properties

Latent Heat of Fusion, J/g 250
390
Maximum Temperature: Mechanical, °C 410
220
Melting Completion (Liquidus), °C 1460
650
Melting Onset (Solidus), °C 1420
550
Specific Heat Capacity, J/kg-K 470
870
Thermal Conductivity, W/m-K 39 to 51
120
Thermal Expansion, µm/m-K 13
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2 to 7.4
32
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.4
95

Otherwise Unclassified Properties

Base Metal Price, % relative 2.4 to 3.0
11
Density, g/cm3 7.8 to 7.9
3.0
Embodied Carbon, kg CO2/kg material 1.5 to 1.6
8.3
Embodied Energy, MJ/kg 20 to 21
160
Embodied Water, L/kg 48 to 50
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 120
16 to 35
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 410
540 to 770
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
45
Strength to Weight: Axial, points 21 to 22
35 to 38
Strength to Weight: Bending, points 20 to 21
38 to 41
Thermal Diffusivity, mm2/s 10 to 14
47
Thermal Shock Resistance, points 17 to 18
17 to 18