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518.0 Aluminum vs. ASTM A204 Steel

518.0 aluminum belongs to the aluminum alloys classification, while ASTM A204 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 518.0 aluminum and the bottom bar is ASTM A204 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
160 to 180
Elastic (Young's, Tensile) Modulus, GPa 67
190
Elongation at Break, % 5.0
18 to 22
Fatigue Strength, MPa 140
200 to 220
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
73
Shear Strength, MPa 200
330 to 360
Tensile Strength: Ultimate (UTS), MPa 310
520 to 590
Tensile Strength: Yield (Proof), MPa 190
290 to 330

Thermal Properties

Latent Heat of Fusion, J/g 390
250
Maximum Temperature: Mechanical, °C 170
410
Melting Completion (Liquidus), °C 620
1470
Melting Onset (Solidus), °C 560
1420 to 1430
Specific Heat Capacity, J/kg-K 900
470
Thermal Conductivity, W/m-K 98
52
Thermal Expansion, µm/m-K 24
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 24
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 81
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.4
Density, g/cm3 2.7
7.9
Embodied Carbon, kg CO2/kg material 9.4
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1160
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 14
90 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 270
220 to 290
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
24
Strength to Weight: Axial, points 32
18 to 21
Strength to Weight: Bending, points 38
18 to 20
Thermal Diffusivity, mm2/s 40
14
Thermal Shock Resistance, points 14
15 to 17