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Automotive Malleable Cast Iron vs. Zamak 3

Automotive malleable cast iron belongs to the iron alloys classification, while Zamak 3 belongs to the zinc alloys. There are 28 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is automotive malleable cast iron and the bottom bar is Zamak 3.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 290
83
Elastic (Young's, Tensile) Modulus, GPa 180
86
Elongation at Break, % 1.0 to 10
11
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 70
33
Tensile Strength: Ultimate (UTS), MPa 350 to 720
280
Tensile Strength: Yield (Proof), MPa 220 to 590
210

Thermal Properties

Latent Heat of Fusion, J/g 260
120
Melting Completion (Liquidus), °C 1410
390
Melting Onset (Solidus), °C 1370
380
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 41
110
Thermal Expansion, µm/m-K 14
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.7
38

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
11
Density, g/cm3 7.6
6.4
Embodied Carbon, kg CO2/kg material 1.5
3.0
Embodied Energy, MJ/kg 20
57
Embodied Water, L/kg 45
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.8 to 30
28
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 950
260
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 13 to 26
12
Strength to Weight: Bending, points 14 to 24
15
Thermal Diffusivity, mm2/s 11
43
Thermal Shock Resistance, points 9.9 to 21
8.6

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Carbon (C), % 2.2 to 2.9
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 93.6 to 96.7
0 to 0.1
Lead (Pb), % 0
0 to 0.0050
Magnesium (Mg), % 0
0.020 to 0.060
Manganese (Mn), % 0.15 to 1.3
0
Nickel (Ni), % 0
0 to 0.020
Phosphorus (P), % 0.020 to 0.15
0
Silicon (Si), % 0.9 to 1.9
0 to 0.030
Sulfur (S), % 0.020 to 0.2
0
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 0
95.3 to 96.5