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AS41A Magnesium vs. Ductile Cast Iron

AS41A magnesium belongs to the magnesium alloys classification, while ductile 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 AS41A magnesium and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
170 to 180
Elongation at Break, % 11
2.1 to 20
Poisson's Ratio 0.29
0.28 to 0.31
Shear Modulus, GPa 17
64 to 70
Shear Strength, MPa 130
420 to 800
Tensile Strength: Ultimate (UTS), MPa 230
460 to 920
Tensile Strength: Yield (Proof), MPa 140
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 370
270
Maximum Temperature: Mechanical, °C 110
290
Melting Completion (Liquidus), °C 620
1160
Melting Onset (Solidus), °C 570
1120
Specific Heat Capacity, J/kg-K 1000
490
Thermal Conductivity, W/m-K 68
31 to 36
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 92
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.9
Density, g/cm3 1.6
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 23
1.5
Embodied Energy, MJ/kg 160
21
Embodied Water, L/kg 980
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 220
280 to 1330
Stiffness to Weight: Axial, points 15
12 to 14
Stiffness to Weight: Bending, points 72
24 to 26
Strength to Weight: Axial, points 38
17 to 35
Strength to Weight: Bending, points 50
18 to 29
Thermal Diffusivity, mm2/s 41
8.9 to 10
Thermal Shock Resistance, points 14
17 to 35

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Carbon (C), % 0
3.0 to 3.5
Copper (Cu), % 0 to 0.060
0
Iron (Fe), % 0
93.7 to 95.5
Magnesium (Mg), % 92.8 to 95.8
0
Manganese (Mn), % 0.2 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.080
Silicon (Si), % 0.5 to 1.5
1.5 to 2.8
Zinc (Zn), % 0 to 0.12
0