MakeItFrom.com
Menu (ESC)

7178 Aluminum vs. Automotive Malleable Cast Iron

7178 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 7178 aluminum and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
180
Elongation at Break, % 4.5 to 12
1.0 to 10
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 27
70
Tensile Strength: Ultimate (UTS), MPa 240 to 640
350 to 720
Tensile Strength: Yield (Proof), MPa 120 to 560
220 to 590

Thermal Properties

Latent Heat of Fusion, J/g 370
260
Melting Completion (Liquidus), °C 630
1410
Melting Onset (Solidus), °C 480
1370
Specific Heat Capacity, J/kg-K 860
480
Thermal Conductivity, W/m-K 130
41
Thermal Expansion, µm/m-K 23
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 91
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
1.9
Density, g/cm3 3.1
7.6
Embodied Carbon, kg CO2/kg material 8.2
1.5
Embodied Energy, MJ/kg 150
20
Embodied Water, L/kg 1110
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
6.8 to 30
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
130 to 950
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 45
25
Strength to Weight: Axial, points 21 to 58
13 to 26
Strength to Weight: Bending, points 28 to 54
14 to 24
Thermal Diffusivity, mm2/s 47
11
Thermal Shock Resistance, points 10 to 28
9.9 to 21

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Carbon (C), % 0
2.2 to 2.9
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
0
Iron (Fe), % 0 to 0.5
93.6 to 96.7
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0.15 to 1.3
Phosphorus (P), % 0
0.020 to 0.15
Silicon (Si), % 0 to 0.4
0.9 to 1.9
Sulfur (S), % 0
0.020 to 0.2
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
0
Residuals, % 0 to 0.15
0

Comparable Variants