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6106 Aluminum vs. Automotive Malleable Cast Iron

6106 aluminum belongs to the aluminum alloys classification, while automotive malleable cast iron belongs to the iron alloys. There are 27 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 6106 aluminum and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
180
Elongation at Break, % 9.1
1.0 to 10
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
70
Tensile Strength: Ultimate (UTS), MPa 290
350 to 720
Tensile Strength: Yield (Proof), MPa 220
220 to 590

Thermal Properties

Latent Heat of Fusion, J/g 400
260
Melting Completion (Liquidus), °C 660
1410
Melting Onset (Solidus), °C 610
1370
Specific Heat Capacity, J/kg-K 900
480
Thermal Conductivity, W/m-K 190
41
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 49
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 160
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.9
Density, g/cm3 2.7
7.6
Embodied Carbon, kg CO2/kg material 8.3
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1190
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24
6.8 to 30
Resilience: Unit (Modulus of Resilience), kJ/m3 370
130 to 950
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
25
Strength to Weight: Axial, points 29
13 to 26
Strength to Weight: Bending, points 35
14 to 24
Thermal Diffusivity, mm2/s 78
11
Thermal Shock Resistance, points 13
9.9 to 21

Alloy Composition

Aluminum (Al), % 97.2 to 99.3
0
Carbon (C), % 0
2.2 to 2.9
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 0 to 0.35
93.6 to 96.7
Magnesium (Mg), % 0.4 to 0.8
0
Manganese (Mn), % 0.050 to 0.2
0.15 to 1.3
Phosphorus (P), % 0
0.020 to 0.15
Silicon (Si), % 0.3 to 0.6
0.9 to 1.9
Sulfur (S), % 0
0.020 to 0.2
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.15
0
Residuals, % 0 to 0.15
0