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EN-MC21110 Magnesium vs. Grey Cast Iron

EN-MC21110 magnesium belongs to the magnesium alloys classification, while grey cast iron belongs to the iron 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 EN-MC21110 magnesium and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58 to 63
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 46
180
Elongation at Break, % 2.8 to 6.7
9.6
Fatigue Strength, MPa 75 to 78
69 to 170
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 18
69
Shear Strength, MPa 120 to 160
180 to 610
Tensile Strength: Ultimate (UTS), MPa 200 to 270
160 to 450
Tensile Strength: Yield (Proof), MPa 100 to 120
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 350
280
Melting Completion (Liquidus), °C 600
1380
Melting Onset (Solidus), °C 500
1180
Specific Heat Capacity, J/kg-K 990
490
Thermal Conductivity, W/m-K 80
46
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 61
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.9
Density, g/cm3 1.7
7.5
Embodied Carbon, kg CO2/kg material 23
1.5
Embodied Energy, MJ/kg 160
21
Embodied Water, L/kg 990
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.9 to 14
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 150
27 to 240
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
25
Strength to Weight: Axial, points 33 to 44
5.8 to 17
Strength to Weight: Bending, points 45 to 54
8.7 to 17
Thermal Diffusivity, mm2/s 47
13
Thermal Shock Resistance, points 12 to 16
6.0 to 17

Alloy Composition

Aluminum (Al), % 7.0 to 8.7
0
Carbon (C), % 0
3.1 to 3.4
Copper (Cu), % 0 to 0.030
0
Iron (Fe), % 0 to 0.0050
92.1 to 93.9
Magnesium (Mg), % 89.6 to 92.6
0
Manganese (Mn), % 0.1 to 0.35
0.5 to 0.7
Nickel (Ni), % 0 to 0.0020
0
Phosphorus (P), % 0
0 to 0.9
Silicon (Si), % 0 to 0.2
2.5 to 2.8
Sulfur (S), % 0
0 to 0.15
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0 to 0.010
0