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328.0 Aluminum vs. ASTM A302 Alloy Steel

328.0 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 (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 328.0 aluminum and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 82
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 72
190
Elongation at Break, % 1.6 to 2.1
20 to 23
Fatigue Strength, MPa 55 to 80
250 to 280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
73
Tensile Strength: Ultimate (UTS), MPa 200 to 270
590 to 620
Tensile Strength: Yield (Proof), MPa 120 to 170
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 510
250
Maximum Temperature: Mechanical, °C 180
410
Melting Completion (Liquidus), °C 620
1460
Melting Onset (Solidus), °C 560
1420
Specific Heat Capacity, J/kg-K 890
470
Thermal Conductivity, W/m-K 120
39 to 51
Thermal Expansion, µm/m-K 22
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 99
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 10
2.4 to 3.0
Density, g/cm3 2.7
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 7.8
1.5 to 1.6
Embodied Energy, MJ/kg 140
20 to 21
Embodied Water, L/kg 1070
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.8 to 5.0
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 92 to 200
330 to 410
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 21 to 28
21 to 22
Strength to Weight: Bending, points 28 to 34
20 to 21
Thermal Diffusivity, mm2/s 50
10 to 14
Thermal Shock Resistance, points 9.2 to 12
17 to 18