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ACI-ASTM CD3MWCuN Steel vs. ZE63A Magnesium

ACI-ASTM CD3MWCuN steel belongs to the iron alloys classification, while ZE63A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, 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 CD3MWCuN steel and the bottom bar is ZE63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
46
Elongation at Break, % 29
7.7
Fatigue Strength, MPa 370
120
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 80
17
Tensile Strength: Ultimate (UTS), MPa 790
300
Tensile Strength: Yield (Proof), MPa 500
190

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1100
170
Melting Completion (Liquidus), °C 1460
510
Melting Onset (Solidus), °C 1410
390
Specific Heat Capacity, J/kg-K 470
950
Thermal Conductivity, W/m-K 16
110
Thermal Expansion, µm/m-K 13
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
31
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
140

Otherwise Unclassified Properties

Base Metal Price, % relative 22
22
Density, g/cm3 7.9
2.0
Embodied Carbon, kg CO2/kg material 4.2
24
Embodied Energy, MJ/kg 58
180
Embodied Water, L/kg 180
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
20
Resilience: Unit (Modulus of Resilience), kJ/m3 620
400
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
58
Strength to Weight: Axial, points 28
40
Strength to Weight: Bending, points 24
48
Thermal Diffusivity, mm2/s 4.2
57
Thermal Shock Resistance, points 22
17

Alloy Composition

Carbon (C), % 0 to 0.030
0
Chromium (Cr), % 24 to 26
0
Copper (Cu), % 0.5 to 1.0
0 to 0.1
Iron (Fe), % 56.6 to 65.3
0
Magnesium (Mg), % 0
89.6 to 92
Manganese (Mn), % 0 to 1.5
0
Molybdenum (Mo), % 3.0 to 4.0
0
Nickel (Ni), % 6.5 to 8.5
0 to 0.010
Nitrogen (N), % 0.2 to 0.3
0
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.025
0
Tungsten (W), % 0.5 to 1.0
0
Unspecified Rare Earths, % 0
2.1 to 3.0
Zinc (Zn), % 0
5.5 to 6.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3