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Ductile Cast Iron vs. 6063 Aluminum

Ductile cast iron belongs to the iron alloys classification, while 6063 aluminum belongs to the aluminum alloys. There are 30 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 ductile cast iron and the bottom bar is 6063 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
25 to 95
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
68
Elongation at Break, % 2.1 to 20
7.3 to 21
Poisson's Ratio 0.28 to 0.31
0.33
Shear Modulus, GPa 64 to 70
26
Shear Strength, MPa 420 to 800
70 to 190
Tensile Strength: Ultimate (UTS), MPa 460 to 920
110 to 300
Tensile Strength: Yield (Proof), MPa 310 to 670
49 to 270

Thermal Properties

Latent Heat of Fusion, J/g 270
400
Maximum Temperature: Mechanical, °C 290
160
Melting Completion (Liquidus), °C 1160
650
Melting Onset (Solidus), °C 1120
620
Specific Heat Capacity, J/kg-K 490
900
Thermal Conductivity, W/m-K 31 to 36
190 to 220
Thermal Expansion, µm/m-K 11
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
49 to 58
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
160 to 190

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
9.5
Density, g/cm3 7.1 to 7.5
2.7
Embodied Carbon, kg CO2/kg material 1.5
8.3
Embodied Energy, MJ/kg 21
150
Embodied Water, L/kg 43
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
13 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
18 to 540
Stiffness to Weight: Axial, points 12 to 14
14
Stiffness to Weight: Bending, points 24 to 26
50
Strength to Weight: Axial, points 17 to 35
11 to 31
Strength to Weight: Bending, points 18 to 29
18 to 37
Thermal Diffusivity, mm2/s 8.9 to 10
79 to 89
Thermal Shock Resistance, points 17 to 35
4.8 to 13

Alloy Composition

Aluminum (Al), % 0
97.5 to 99.4
Carbon (C), % 3.0 to 3.5
0
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 93.7 to 95.5
0 to 0.35
Magnesium (Mg), % 0
0.45 to 0.9
Manganese (Mn), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.080
0
Silicon (Si), % 1.5 to 2.8
0.2 to 0.6
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0
0 to 0.1
Residuals, % 0
0 to 0.15

Comparable Variants