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ASTM A732 Cast Steel vs. ISO-WD43150 Magnesium

ASTM A732 cast steel belongs to the iron alloys classification, while ISO-WD43150 magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 ASTM A732 cast steel and the bottom bar is ISO-WD43150 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 4.0 to 25
2.8
Fatigue Strength, MPa 230 to 750
100
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72 to 73
18
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
250
Tensile Strength: Yield (Proof), MPa 310 to 1340
150

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
350
Maximum Temperature: Mechanical, °C 400 to 430
95
Melting Completion (Liquidus), °C 1440 to 1460
610
Melting Onset (Solidus), °C 1400 to 1420
590
Specific Heat Capacity, J/kg-K 470 to 480
990
Thermal Conductivity, W/m-K 39 to 50
140
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
31
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
170

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
12
Density, g/cm3 7.8 to 7.9
1.7
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
24
Embodied Energy, MJ/kg 19 to 24
160
Embodied Water, L/kg 47 to 54
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
6.1
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
250
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
71
Strength to Weight: Axial, points 16 to 52
41
Strength to Weight: Bending, points 17 to 37
52
Thermal Diffusivity, mm2/s 10 to 14
81
Thermal Shock Resistance, points 14 to 43
14