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ACI-ASTM CC50 Steel vs. ZK61A Magnesium

ACI-ASTM CC50 steel belongs to the iron alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 24 material properties with values for both materials. Properties with values for just one material (10, 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 ACI-ASTM CC50 steel and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
18
Tensile Strength: Ultimate (UTS), MPa 430
290 to 310

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1100
120
Melting Completion (Liquidus), °C 1420
640
Melting Onset (Solidus), °C 1370
530
Specific Heat Capacity, J/kg-K 490
960
Thermal Conductivity, W/m-K 17
120
Thermal Expansion, µm/m-K 11
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
29
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
130

Otherwise Unclassified Properties

Base Metal Price, % relative 14
13
Density, g/cm3 7.6
1.9
Embodied Carbon, kg CO2/kg material 2.7
23
Embodied Energy, MJ/kg 39
160
Embodied Water, L/kg 170
940

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 26
62
Strength to Weight: Axial, points 16
42 to 45
Strength to Weight: Bending, points 17
50 to 53
Thermal Diffusivity, mm2/s 4.5
65
Thermal Shock Resistance, points 14
17 to 18

Alloy Composition

Carbon (C), % 0 to 0.5
0
Chromium (Cr), % 26 to 30
0
Copper (Cu), % 0
0 to 0.1
Iron (Fe), % 62.9 to 74
0
Magnesium (Mg), % 0
92.1 to 93.9
Manganese (Mn), % 0 to 1.0
0
Nickel (Ni), % 0 to 4.0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.5
0
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3