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ASTM A732 Cast Steel vs. ZE41A Magnesium

ASTM A732 cast steel belongs to the iron alloys classification, while ZE41A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 ZE41A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 440
63
Elastic (Young's, Tensile) Modulus, GPa 190
45
Elongation at Break, % 4.0 to 25
3.3
Fatigue Strength, MPa 230 to 750
98
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72 to 73
18
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
210
Tensile Strength: Yield (Proof), MPa 310 to 1340
140

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
330
Maximum Temperature: Mechanical, °C 400 to 430
150
Melting Completion (Liquidus), °C 1440 to 1460
640
Melting Onset (Solidus), °C 1400 to 1420
540
Specific Heat Capacity, J/kg-K 470 to 480
970
Thermal Conductivity, W/m-K 39 to 50
110
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
130

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
18
Density, g/cm3 7.8 to 7.9
1.9
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
24
Embodied Energy, MJ/kg 19 to 24
170
Embodied Water, L/kg 47 to 54
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
6.1
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
220
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
63
Strength to Weight: Axial, points 16 to 52
31
Strength to Weight: Bending, points 17 to 37
41
Thermal Diffusivity, mm2/s 10 to 14
59
Thermal Shock Resistance, points 14 to 43
12