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ACI-ASTM CH20 Steel vs. 2007 Aluminum

ACI-ASTM CH20 steel belongs to the iron alloys classification, while 2007 aluminum belongs to the aluminum alloys. There are 29 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 ACI-ASTM CH20 steel and the bottom bar is 2007 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 38
5.6 to 8.0
Fatigue Strength, MPa 290
91 to 110
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 610
370 to 420
Tensile Strength: Yield (Proof), MPa 350
240 to 270

Thermal Properties

Latent Heat of Fusion, J/g 310
390
Maximum Temperature: Mechanical, °C 1100
190
Melting Completion (Liquidus), °C 1410
640
Melting Onset (Solidus), °C 1430
510
Specific Heat Capacity, J/kg-K 480
870
Thermal Conductivity, W/m-K 14
130
Thermal Expansion, µm/m-K 15
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
47
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
140

Otherwise Unclassified Properties

Base Metal Price, % relative 20
11
Density, g/cm3 7.8
3.1
Embodied Carbon, kg CO2/kg material 3.7
8.0
Embodied Energy, MJ/kg 53
150
Embodied Water, L/kg 180
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
21 to 26
Resilience: Unit (Modulus of Resilience), kJ/m3 300
390 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
44
Strength to Weight: Axial, points 22
33 to 38
Strength to Weight: Bending, points 21
37 to 40
Thermal Diffusivity, mm2/s 3.7
48
Thermal Shock Resistance, points 15
16 to 19

Alloy Composition

Aluminum (Al), % 0
87.5 to 95
Bismuth (Bi), % 0
0 to 0.2
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 22 to 26
0 to 0.1
Copper (Cu), % 0
3.3 to 4.6
Iron (Fe), % 54.7 to 66
0 to 0.8
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0
0.4 to 1.8
Manganese (Mn), % 0 to 1.5
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
0 to 0.2
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
0 to 0.8
Sulfur (S), % 0 to 0.040
0
Tin (Sn), % 0
0 to 0.2
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 0.8
Residuals, % 0
0 to 0.3