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ASTM A732 Cast Steel vs. EZ33A Magnesium

ASTM A732 cast steel belongs to the iron alloys classification, while EZ33A magnesium belongs to the magnesium alloys. There are 30 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 ASTM A732 cast steel and the bottom bar is EZ33A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 440
55
Elastic (Young's, Tensile) Modulus, GPa 190
44
Elongation at Break, % 4.0 to 25
2.6
Fatigue Strength, MPa 230 to 750
70
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72 to 73
17
Tensile Strength: Ultimate (UTS), MPa 460 to 1470
150
Tensile Strength: Yield (Proof), MPa 310 to 1340
100

Thermal Properties

Latent Heat of Fusion, J/g 250 to 260
330
Maximum Temperature: Mechanical, °C 400 to 430
250
Melting Completion (Liquidus), °C 1440 to 1460
640
Melting Onset (Solidus), °C 1400 to 1420
570
Specific Heat Capacity, J/kg-K 470 to 480
970
Thermal Conductivity, W/m-K 39 to 50
100
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1 to 7.7
24
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2 to 8.9
110

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0 to 3.8
25
Density, g/cm3 7.8 to 7.9
1.9
Embodied Carbon, kg CO2/kg material 1.4 to 1.7
25
Embodied Energy, MJ/kg 19 to 24
190
Embodied Water, L/kg 47 to 54
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 45 to 130
3.6
Resilience: Unit (Modulus of Resilience), kJ/m3 260 to 4770
120
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
61
Strength to Weight: Axial, points 16 to 52
22
Strength to Weight: Bending, points 17 to 37
33
Thermal Diffusivity, mm2/s 10 to 14
54
Thermal Shock Resistance, points 14 to 43
9.2