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ZK40A Magnesium vs. ACI-ASTM CC50 Steel

ZK40A magnesium belongs to the magnesium alloys classification, while ACI-ASTM CC50 steel belongs to the iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 ZK40A magnesium and the bottom bar is ACI-ASTM CC50 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 17
80
Tensile Strength: Ultimate (UTS), MPa 280
430

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Mechanical, °C 120
1100
Melting Completion (Liquidus), °C 600
1420
Melting Onset (Solidus), °C 540
1370
Specific Heat Capacity, J/kg-K 970
490
Thermal Conductivity, W/m-K 110
17
Thermal Expansion, µm/m-K 26
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 130
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
14
Density, g/cm3 1.8
7.6
Embodied Carbon, kg CO2/kg material 24
2.7
Embodied Energy, MJ/kg 160
39
Embodied Water, L/kg 950
170

Common Calculations

Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 65
26
Strength to Weight: Axial, points 43
16
Strength to Weight: Bending, points 53
17
Thermal Diffusivity, mm2/s 62
4.5
Thermal Shock Resistance, points 17
14

Alloy Composition


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Carbon (C), % 0
0 to 0.5
Chromium (Cr), % 0
26 to 30
Iron (Fe), % 0
62.9 to 74
Magnesium (Mg), % 94.2 to 96.1
0
Manganese (Mn), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 4.0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.5
Sulfur (S), % 0
0 to 0.040
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0