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Austempered Cast Iron vs. ISO-WD32260 Magnesium

Austempered cast iron belongs to the iron alloys classification, while ISO-WD32260 magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 austempered cast iron and the bottom bar is ISO-WD32260 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
46
Elongation at Break, % 1.1 to 13
4.5 to 6.0
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 62 to 69
18
Tensile Strength: Ultimate (UTS), MPa 860 to 1800
330 to 340
Tensile Strength: Yield (Proof), MPa 560 to 1460
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 280
330
Melting Completion (Liquidus), °C 1380
600
Melting Onset (Solidus), °C 1340
520
Specific Heat Capacity, J/kg-K 490
970
Thermal Conductivity, W/m-K 42
110
Thermal Expansion, µm/m-K 13
27

Otherwise Unclassified Properties

Base Metal Price, % relative 2.9
13
Density, g/cm3 7.5
1.9
Embodied Carbon, kg CO2/kg material 1.8
23
Embodied Energy, MJ/kg 25
160
Embodied Water, L/kg 48
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19 to 95
14 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 3970
560 to 700
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
63
Strength to Weight: Axial, points 32 to 66
48 to 51
Strength to Weight: Bending, points 27 to 44
56 to 58
Thermal Diffusivity, mm2/s 11
63
Thermal Shock Resistance, points 25 to 53
19 to 20

Alloy Composition

Aluminum (Al), % 0 to 0.050
0
Arsenic (As), % 0 to 0.020
0
Carbon (C), % 3.4 to 3.8
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.8
0
Iron (Fe), % 89.6 to 94
0
Magnesium (Mg), % 0 to 0.040
92.7 to 94.8
Manganese (Mn), % 0.3 to 0.4
0
Molybdenum (Mo), % 0 to 0.3
0
Nickel (Ni), % 0 to 2.0
0
Phosphorus (P), % 0 to 0.040
0
Selenium (Se), % 0 to 0.030
0
Silicon (Si), % 2.3 to 2.7
0
Sulfur (S), % 0 to 0.020
0
Tin (Sn), % 0 to 0.020
0
Vanadium (V), % 0 to 0.1
0
Zinc (Zn), % 0
4.8 to 6.2
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3