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ACI-ASTM CB7Cu-2 Steel vs. A357.0 Aluminum

ACI-ASTM CB7Cu-2 steel belongs to the iron alloys classification, while A357.0 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 A357.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
100
Elastic (Young's, Tensile) Modulus, GPa 190
70
Elongation at Break, % 5.7 to 11
3.7
Fatigue Strength, MPa 420 to 590
100
Poisson's Ratio 0.28
0.33
Shear Modulus, GPa 75
26
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
350
Tensile Strength: Yield (Proof), MPa 760 to 1180
270

Thermal Properties

Latent Heat of Fusion, J/g 280
500
Melting Completion (Liquidus), °C 1430
610
Melting Onset (Solidus), °C 1380
560
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 17
160
Thermal Expansion, µm/m-K 11
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
40
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
140

Otherwise Unclassified Properties

Base Metal Price, % relative 13
12
Density, g/cm3 7.8
2.6
Embodied Carbon, kg CO2/kg material 2.6
8.2
Embodied Energy, MJ/kg 38
150
Embodied Water, L/kg 130
1110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
12
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
520
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
53
Strength to Weight: Axial, points 34 to 48
38
Strength to Weight: Bending, points 28 to 35
43
Thermal Diffusivity, mm2/s 4.6
68
Thermal Shock Resistance, points 32 to 45
17

Alloy Composition

Aluminum (Al), % 0
90.8 to 93
Beryllium (Be), % 0
0.040 to 0.070
Carbon (C), % 0 to 0.070
0
Chromium (Cr), % 14 to 15.5
0
Copper (Cu), % 2.5 to 3.2
0 to 0.2
Iron (Fe), % 73.6 to 79
0 to 0.2
Magnesium (Mg), % 0
0.4 to 0.7
Manganese (Mn), % 0 to 0.7
0 to 0.1
Nickel (Ni), % 4.5 to 5.5
0
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
6.5 to 7.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
0.040 to 0.2
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15