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ACI-ASTM CB30 Steel vs. 5051A Aluminum

ACI-ASTM CB30 steel belongs to the iron alloys classification, while 5051A aluminum belongs to the aluminum alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 ACI-ASTM CB30 steel and the bottom bar is 5051A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
68
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 77
26
Tensile Strength: Ultimate (UTS), MPa 500
170
Tensile Strength: Yield (Proof), MPa 230
56

Thermal Properties

Latent Heat of Fusion, J/g 290
400
Maximum Temperature: Mechanical, °C 940
190
Melting Completion (Liquidus), °C 1430
640
Melting Onset (Solidus), °C 1380
610
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 21
150
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
39
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 7.7
2.7
Embodied Carbon, kg CO2/kg material 2.3
8.5
Embodied Energy, MJ/kg 33
150
Embodied Water, L/kg 130
1190

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 140
23
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
50
Strength to Weight: Axial, points 18
17 to 18
Strength to Weight: Bending, points 18
25
Thermal Diffusivity, mm2/s 5.6
63
Thermal Shock Resistance, points 17
7.6

Alloy Composition

Aluminum (Al), % 0
96.1 to 98.6
Carbon (C), % 0 to 0.3
0
Chromium (Cr), % 18 to 21
0 to 0.3
Copper (Cu), % 0 to 1.2
0 to 0.050
Iron (Fe), % 72.9 to 82
0 to 0.45
Magnesium (Mg), % 0
1.4 to 2.1
Manganese (Mn), % 0 to 1.0
0 to 0.25
Nickel (Ni), % 0 to 2.0
0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
0 to 0.3
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.15