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Ductile Cast Iron vs. ISO-WD32350 Magnesium

Ductile cast iron belongs to the iron alloys classification, while ISO-WD32350 magnesium belongs to the magnesium 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 ductile cast iron and the bottom bar is ISO-WD32350 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 170 to 180
45
Elongation at Break, % 2.1 to 20
5.7 to 10
Poisson's Ratio 0.28 to 0.31
0.29
Shear Modulus, GPa 64 to 70
18
Shear Strength, MPa 420 to 800
150 to 170
Tensile Strength: Ultimate (UTS), MPa 460 to 920
250 to 290
Tensile Strength: Yield (Proof), MPa 310 to 670
140 to 180

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Maximum Temperature: Mechanical, °C 290
95
Melting Completion (Liquidus), °C 1160
600
Melting Onset (Solidus), °C 1120
560
Specific Heat Capacity, J/kg-K 490
990
Thermal Conductivity, W/m-K 31 to 36
130
Thermal Expansion, µm/m-K 11
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
25
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
1.7
Embodied Carbon, kg CO2/kg material 1.5
23
Embodied Energy, MJ/kg 21
160
Embodied Water, L/kg 43
960

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
14 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
210 to 380
Stiffness to Weight: Axial, points 12 to 14
15
Stiffness to Weight: Bending, points 24 to 26
68
Strength to Weight: Axial, points 17 to 35
39 to 46
Strength to Weight: Bending, points 18 to 29
50 to 55
Thermal Diffusivity, mm2/s 8.9 to 10
73
Thermal Shock Resistance, points 17 to 35
16 to 18

Alloy Composition

Aluminum (Al), % 0
0 to 0.1
Carbon (C), % 3.0 to 3.5
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 93.7 to 95.5
0 to 0.060
Magnesium (Mg), % 0
95.7 to 97.7
Manganese (Mn), % 0
0.6 to 1.3
Nickel (Ni), % 0
0 to 0.0050
Phosphorus (P), % 0 to 0.080
0
Silicon (Si), % 1.5 to 2.8
0 to 0.1
Zinc (Zn), % 0
1.8 to 2.3
Residuals, % 0
0 to 0.3

Comparable Variants