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384.0 Aluminum vs. ASTM A302 Alloy Steel

384.0 aluminum belongs to the aluminum alloys classification, while ASTM A302 alloy steel belongs to the iron alloys. 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 384.0 aluminum and the bottom bar is ASTM A302 alloy steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 85
180 to 190
Elastic (Young's, Tensile) Modulus, GPa 74
190
Elongation at Break, % 2.5
20 to 23
Fatigue Strength, MPa 140
250 to 280
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 28
73
Shear Strength, MPa 200
370 to 390
Tensile Strength: Ultimate (UTS), MPa 330
590 to 620
Tensile Strength: Yield (Proof), MPa 170
350 to 390

Thermal Properties

Latent Heat of Fusion, J/g 550
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 580
1460
Melting Onset (Solidus), °C 530
1420
Specific Heat Capacity, J/kg-K 870
470
Thermal Conductivity, W/m-K 96
39 to 51
Thermal Expansion, µm/m-K 21
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 22
7.2 to 7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 69
8.2 to 8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.4 to 3.0
Density, g/cm3 2.9
7.8 to 7.9
Embodied Carbon, kg CO2/kg material 7.4
1.5 to 1.6
Embodied Energy, MJ/kg 140
20 to 21
Embodied Water, L/kg 1010
48 to 50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.9
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 190
330 to 410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
24
Strength to Weight: Axial, points 32
21 to 22
Strength to Weight: Bending, points 37
20 to 21
Thermal Diffusivity, mm2/s 39
10 to 14
Thermal Shock Resistance, points 15
17 to 18