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2024 Aluminum vs. Austempered Cast Iron

2024 aluminum belongs to the aluminum alloys classification, while austempered cast iron belongs to the iron alloys. There are 25 material properties with values for both materials. Properties with values for just one material (7, 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 2024 aluminum and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
180
Elongation at Break, % 4.0 to 16
1.1 to 13
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
62 to 69
Tensile Strength: Ultimate (UTS), MPa 200 to 540
860 to 1800
Tensile Strength: Yield (Proof), MPa 100 to 490
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Melting Completion (Liquidus), °C 640
1380
Melting Onset (Solidus), °C 500
1340
Specific Heat Capacity, J/kg-K 880
490
Thermal Conductivity, W/m-K 120
42
Thermal Expansion, µm/m-K 23
13

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.9
Density, g/cm3 3.0
7.5
Embodied Carbon, kg CO2/kg material 8.3
1.8
Embodied Energy, MJ/kg 150
25
Embodied Water, L/kg 1140
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 68
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 70 to 1680
880 to 3970
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 18 to 50
32 to 66
Strength to Weight: Bending, points 25 to 49
27 to 44
Thermal Diffusivity, mm2/s 46
11
Thermal Shock Resistance, points 8.6 to 24
25 to 53

Alloy Composition

Aluminum (Al), % 90.7 to 94.7
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Carbon (C), % 0
3.4 to 3.8
Chromium (Cr), % 0 to 0.1
0 to 0.1
Copper (Cu), % 3.8 to 4.9
0 to 0.8
Iron (Fe), % 0 to 0.5
89.6 to 94
Magnesium (Mg), % 1.2 to 1.8
0 to 0.040
Manganese (Mn), % 0.3 to 0.9
0.3 to 0.4
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0
0 to 0.040
Selenium (Se), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
2.3 to 2.7
Sulfur (S), % 0
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.15
0
Vanadium (V), % 0
0 to 0.1
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0