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238.0 Aluminum vs. ACI-ASTM CB7Cu-1 Steel

238.0 aluminum belongs to the aluminum alloys classification, while ACI-ASTM CB7Cu-1 steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 238.0 aluminum and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
190
Elongation at Break, % 1.5
5.7 to 11
Fatigue Strength, MPa 110
420 to 590
Poisson's Ratio 0.33
0.28
Shear Modulus, GPa 28
76
Tensile Strength: Ultimate (UTS), MPa 210
960 to 1350
Tensile Strength: Yield (Proof), MPa 170
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 430
280
Melting Completion (Liquidus), °C 600
1430
Melting Onset (Solidus), °C 510
1500
Specific Heat Capacity, J/kg-K 840
480
Thermal Conductivity, W/m-K 100
17
Thermal Expansion, µm/m-K 21
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 67
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
13
Density, g/cm3 3.4
7.8
Embodied Carbon, kg CO2/kg material 7.4
2.6
Embodied Energy, MJ/kg 140
38
Embodied Water, L/kg 1040
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 180
1500 to 3590
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 42
25
Strength to Weight: Axial, points 17
34 to 48
Strength to Weight: Bending, points 23
28 to 35
Thermal Diffusivity, mm2/s 37
4.6
Thermal Shock Resistance, points 9.1
32 to 45

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0
Carbon (C), % 0
0 to 0.070
Chromium (Cr), % 0
15.5 to 17.7
Copper (Cu), % 9.5 to 10.5
2.5 to 3.2
Iron (Fe), % 1.0 to 1.5
72.3 to 78.4
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0 to 0.7
Nickel (Ni), % 0
3.6 to 4.6
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 3.6 to 4.4
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Zinc (Zn), % 1.0 to 1.5
0