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ACI-ASTM CB7Cu-2 Steel vs. 851.0 Aluminum

ACI-ASTM CB7Cu-2 steel belongs to the iron alloys classification, while 851.0 aluminum belongs to the aluminum alloys. There are 24 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 ACI-ASTM CB7Cu-2 steel and the bottom bar is 851.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
69
Elongation at Break, % 5.7 to 11
3.9 to 9.1
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
26
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
130 to 140

Thermal Properties

Latent Heat of Fusion, J/g 280
410
Melting Completion (Liquidus), °C 1430
630
Melting Onset (Solidus), °C 1380
360
Specific Heat Capacity, J/kg-K 480
850
Thermal Conductivity, W/m-K 17
180
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
46
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
14
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 2.6
8.4
Embodied Energy, MJ/kg 38
160
Embodied Water, L/kg 130
1140

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
45
Strength to Weight: Axial, points 34 to 48
12 to 13
Strength to Weight: Bending, points 28 to 35
19 to 20
Thermal Diffusivity, mm2/s 4.6
69
Thermal Shock Resistance, points 32 to 45
6.1 to 6.3

Alloy Composition

Aluminum (Al), % 0
86.6 to 91.5
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 14 to 15.5
0
Copper (Cu), % 2.5 to 3.2
0.7 to 1.3
Iron (Fe), % 73.6 to 79
0 to 0.7
Magnesium (Mg), % 0
0 to 0.1
Manganese (Mn), % 0 to 0.7
0 to 0.1
Nickel (Ni), % 4.5 to 5.5
0.3 to 0.7
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
2.0 to 3.0
Sulfur (S), % 0 to 0.030
0
Tin (Sn), % 0
5.5 to 7.0
Titanium (Ti), % 0
0 to 0.2
Residuals, % 0
0 to 0.3