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5056 Aluminum vs. ACI-ASTM CB30 Steel

5056 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CB30 steel belongs to the iron alloys. There are 26 material properties with values for both materials. Properties with values for just one material (8, 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 5056 aluminum and the bottom bar is ACI-ASTM CB30 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
200
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 25
77
Tensile Strength: Ultimate (UTS), MPa 290 to 460
500
Tensile Strength: Yield (Proof), MPa 150 to 410
230

Thermal Properties

Latent Heat of Fusion, J/g 400
290
Maximum Temperature: Mechanical, °C 190
940
Melting Completion (Liquidus), °C 640
1430
Melting Onset (Solidus), °C 570
1380
Specific Heat Capacity, J/kg-K 910
480
Thermal Conductivity, W/m-K 130
21
Thermal Expansion, µm/m-K 24
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 29
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 99
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.7
7.7
Embodied Carbon, kg CO2/kg material 9.0
2.3
Embodied Energy, MJ/kg 150
33
Embodied Water, L/kg 1180
130

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 1220
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
25
Strength to Weight: Axial, points 30 to 48
18
Strength to Weight: Bending, points 36 to 50
18
Thermal Diffusivity, mm2/s 53
5.6
Thermal Shock Resistance, points 13 to 20
17

Alloy Composition


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Aluminum (Al), % 93 to 95.4
0
Carbon (C), % 0
0 to 0.3
Chromium (Cr), % 0.050 to 0.2
18 to 21
Copper (Cu), % 0 to 0.1
0 to 1.2
Iron (Fe), % 0 to 0.4
72.9 to 82
Magnesium (Mg), % 4.5 to 5.6
0
Manganese (Mn), % 0.050 to 0.2
0 to 1.0
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.3
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 0 to 0.1
0
Residuals, % 0 to 0.15
0