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ACI-ASTM CH20 Steel vs. 324.0 Aluminum

ACI-ASTM CH20 steel belongs to the iron alloys classification, while 324.0 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 CH20 steel and the bottom bar is 324.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
71
Elongation at Break, % 38
3.0 to 4.0
Fatigue Strength, MPa 290
77 to 89
Poisson's Ratio 0.27
0.33
Shear Modulus, GPa 78
27
Tensile Strength: Ultimate (UTS), MPa 610
210 to 310
Tensile Strength: Yield (Proof), MPa 350
110 to 270

Thermal Properties

Latent Heat of Fusion, J/g 310
500
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1410
610
Melting Onset (Solidus), °C 1430
550
Specific Heat Capacity, J/kg-K 480
900
Thermal Conductivity, W/m-K 14
150
Thermal Expansion, µm/m-K 15
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
34
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
120

Otherwise Unclassified Properties

Base Metal Price, % relative 20
9.5
Density, g/cm3 7.8
2.7
Embodied Carbon, kg CO2/kg material 3.7
7.9
Embodied Energy, MJ/kg 53
150
Embodied Water, L/kg 180
1090

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
6.8 to 8.9
Resilience: Unit (Modulus of Resilience), kJ/m3 300
85 to 510
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
52
Strength to Weight: Axial, points 22
22 to 32
Strength to Weight: Bending, points 21
29 to 38
Thermal Diffusivity, mm2/s 3.7
62
Thermal Shock Resistance, points 15
9.7 to 14

Alloy Composition

Aluminum (Al), % 0
87.3 to 92.2
Carbon (C), % 0 to 0.2
0
Chromium (Cr), % 22 to 26
0
Copper (Cu), % 0
0.4 to 0.6
Iron (Fe), % 54.7 to 66
0 to 1.2
Magnesium (Mg), % 0
0.4 to 0.7
Manganese (Mn), % 0 to 1.5
0 to 0.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 12 to 15
0 to 0.3
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 2.0
7.0 to 8.0
Sulfur (S), % 0 to 0.040
0
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0
0 to 1.0
Residuals, % 0
0 to 0.2