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EN-MC65220 Magnesium vs. Grey Cast Iron

EN-MC65220 magnesium belongs to the magnesium alloys classification, while grey cast iron belongs to the iron alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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-MC65220 magnesium and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 44
180
Elongation at Break, % 2.2
9.6
Fatigue Strength, MPa 110
69 to 170
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 17
69
Shear Strength, MPa 150
180 to 610
Tensile Strength: Ultimate (UTS), MPa 270
160 to 450
Tensile Strength: Yield (Proof), MPa 200
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Melting Completion (Liquidus), °C 610
1380
Melting Onset (Solidus), °C 550
1180
Specific Heat Capacity, J/kg-K 980
490
Thermal Conductivity, W/m-K 110
46
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 120
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 80
1.9
Density, g/cm3 1.9
7.5
Embodied Carbon, kg CO2/kg material 27
1.5
Embodied Energy, MJ/kg 210
21

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 450
27 to 240
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 62
25
Strength to Weight: Axial, points 40
5.8 to 17
Strength to Weight: Bending, points 49
8.7 to 17
Thermal Diffusivity, mm2/s 61
13
Thermal Shock Resistance, points 17
6.0 to 17

Alloy Composition

Carbon (C), % 0
3.1 to 3.4
Copper (Cu), % 0.050 to 0.1
0
Iron (Fe), % 0 to 0.010
92.1 to 93.9
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.5 to 0.7
Nickel (Ni), % 0 to 0.0050
0
Phosphorus (P), % 0
0 to 0.9
Silicon (Si), % 0 to 0.010
2.5 to 2.8
Silver (Ag), % 1.3 to 1.7
0
Sulfur (S), % 0
0 to 0.15
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0