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Ductile Cast Iron vs. EN-MC21210 Magnesium

Ductile cast iron belongs to the iron alloys classification, while EN-MC21210 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-MC21210 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
48
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
44
Elongation at Break, % 2.1 to 20
14
Poisson's Ratio 0.28 to 0.31
0.29
Shear Modulus, GPa 64 to 70
17
Shear Strength, MPa 420 to 800
110
Tensile Strength: Ultimate (UTS), MPa 460 to 920
190
Tensile Strength: Yield (Proof), MPa 310 to 670
90

Thermal Properties

Latent Heat of Fusion, J/g 270
350
Maximum Temperature: Mechanical, °C 290
100
Melting Completion (Liquidus), °C 1160
600
Melting Onset (Solidus), °C 1120
570
Specific Heat Capacity, J/kg-K 490
1000
Thermal Conductivity, W/m-K 31 to 36
120
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
24
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
130

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
12
Density, g/cm3 7.1 to 7.5
1.6
Embodied Carbon, kg CO2/kg material 1.5
24
Embodied Energy, MJ/kg 21
160
Embodied Water, L/kg 43
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
22
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
92
Stiffness to Weight: Axial, points 12 to 14
15
Stiffness to Weight: Bending, points 24 to 26
72
Strength to Weight: Axial, points 17 to 35
32
Strength to Weight: Bending, points 18 to 29
44
Thermal Diffusivity, mm2/s 8.9 to 10
76
Thermal Shock Resistance, points 17 to 35
11

Alloy Composition

Aluminum (Al), % 0
1.6 to 2.6
Carbon (C), % 3.0 to 3.5
0
Copper (Cu), % 0
0 to 0.010
Iron (Fe), % 93.7 to 95.5
0 to 0.0050
Magnesium (Mg), % 0
96.3 to 98.3
Manganese (Mn), % 0
0.1 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Phosphorus (P), % 0 to 0.080
0
Silicon (Si), % 1.5 to 2.8
0 to 0.1
Zinc (Zn), % 0
0 to 0.2
Residuals, % 0
0 to 0.010