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Ductile Cast Iron vs. EN-MC65120 Magnesium

Ductile cast iron belongs to the iron alloys classification, while EN-MC65120 magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 EN-MC65120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
55
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
45
Elongation at Break, % 2.1 to 20
3.1
Poisson's Ratio 0.28 to 0.31
0.29
Shear Modulus, GPa 64 to 70
17
Shear Strength, MPa 420 to 800
92
Tensile Strength: Ultimate (UTS), MPa 460 to 920
160
Tensile Strength: Yield (Proof), MPa 310 to 670
110

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Maximum Temperature: Mechanical, °C 290
180
Melting Completion (Liquidus), °C 1160
590
Melting Onset (Solidus), °C 1120
520
Specific Heat Capacity, J/kg-K 490
970
Thermal Conductivity, W/m-K 31 to 36
100
Thermal Expansion, µm/m-K 11
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
25
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
120

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
25
Density, g/cm3 7.1 to 7.5
1.9
Embodied Carbon, kg CO2/kg material 1.5
25
Embodied Energy, MJ/kg 21
190
Embodied Water, L/kg 43
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
4.4
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
140
Stiffness to Weight: Axial, points 12 to 14
13
Stiffness to Weight: Bending, points 24 to 26
62
Strength to Weight: Axial, points 17 to 35
23
Strength to Weight: Bending, points 18 to 29
34
Thermal Diffusivity, mm2/s 8.9 to 10
56
Thermal Shock Resistance, points 17 to 35
9.8

Alloy Composition

Carbon (C), % 3.0 to 3.5
0
Copper (Cu), % 0
0 to 0.030
Iron (Fe), % 93.7 to 95.5
0 to 0.010
Magnesium (Mg), % 0
91.8 to 95.1
Manganese (Mn), % 0
0 to 0.15
Nickel (Ni), % 0
0 to 0.0050
Phosphorus (P), % 0 to 0.080
0
Silicon (Si), % 1.5 to 2.8
0 to 0.010
Unspecified Rare Earths, % 0
2.5 to 4.0
Zinc (Zn), % 0
2.0 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.010