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Austenitic Nodular Cast Iron vs. AZ31C Magnesium

Austenitic nodular cast iron belongs to the iron alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 23 material properties with values for both materials. Properties with values for just one material (8, 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 austenitic nodular cast iron and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180 to 190
45
Elongation at Break, % 6.8 to 34
12
Poisson's Ratio 0.29 to 0.3
0.29
Shear Modulus, GPa 70 to 72
17
Tensile Strength: Ultimate (UTS), MPa 430 to 500
260
Tensile Strength: Yield (Proof), MPa 190 to 240
200

Thermal Properties

Latent Heat of Fusion, J/g 280 to 350
350
Melting Completion (Liquidus), °C 1340 to 1400
600
Melting Onset (Solidus), °C 1300 to 1360
550
Specific Heat Capacity, J/kg-K 470 to 490
990
Thermal Expansion, µm/m-K 13 to 14
26

Otherwise Unclassified Properties

Base Metal Price, % relative 16 to 25
12
Density, g/cm3 7.7 to 8.0
1.7
Embodied Carbon, kg CO2/kg material 3.5 to 4.9
23
Embodied Energy, MJ/kg 48 to 68
160
Embodied Water, L/kg 91 to 120
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 140
28
Resilience: Unit (Modulus of Resilience), kJ/m3 98 to 160
440
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24 to 25
70
Strength to Weight: Axial, points 15 to 18
42
Strength to Weight: Bending, points 16 to 18
53
Thermal Shock Resistance, points 12 to 15
16