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2024 Aluminum vs. Grey Cast Iron

2024 aluminum belongs to the aluminum alloys classification, while grey cast iron belongs to the iron 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 2024 aluminum and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
180
Elongation at Break, % 4.0 to 16
9.6
Fatigue Strength, MPa 90 to 180
69 to 170
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
69
Shear Strength, MPa 130 to 320
180 to 610
Tensile Strength: Ultimate (UTS), MPa 200 to 540
160 to 450
Tensile Strength: Yield (Proof), MPa 100 to 490
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 390
280
Melting Completion (Liquidus), °C 640
1380
Melting Onset (Solidus), °C 500
1180
Specific Heat Capacity, J/kg-K 880
490
Thermal Conductivity, W/m-K 120
46
Thermal Expansion, µm/m-K 23
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 90
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 11
1.9
Density, g/cm3 3.0
7.5
Embodied Carbon, kg CO2/kg material 8.3
1.5
Embodied Energy, MJ/kg 150
21
Embodied Water, L/kg 1140
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 68
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 70 to 1680
27 to 240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
25
Strength to Weight: Axial, points 18 to 50
5.8 to 17
Strength to Weight: Bending, points 25 to 49
8.7 to 17
Thermal Diffusivity, mm2/s 46
13
Thermal Shock Resistance, points 8.6 to 24
6.0 to 17

Alloy Composition

Aluminum (Al), % 90.7 to 94.7
0
Carbon (C), % 0
3.1 to 3.4
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
0
Iron (Fe), % 0 to 0.5
92.1 to 93.9
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0.5 to 0.7
Phosphorus (P), % 0
0 to 0.9
Silicon (Si), % 0 to 0.5
2.5 to 2.8
Sulfur (S), % 0
0 to 0.15
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0