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ACI-ASTM CD4MCu Steel vs. ZC63A Magnesium

ACI-ASTM CD4MCu steel belongs to the iron alloys classification, while ZC63A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, 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 CD4MCu steel and the bottom bar is ZC63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
48
Elongation at Break, % 18
3.3
Fatigue Strength, MPa 340
94
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
19
Tensile Strength: Ultimate (UTS), MPa 770
220
Tensile Strength: Yield (Proof), MPa 550
130

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Mechanical, °C 1100
98
Melting Completion (Liquidus), °C 1430
550
Melting Onset (Solidus), °C 1380
470
Specific Heat Capacity, J/kg-K 480
950
Thermal Conductivity, W/m-K 17
120
Thermal Expansion, µm/m-K 13
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
32
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
140

Otherwise Unclassified Properties

Base Metal Price, % relative 18
13
Density, g/cm3 7.8
2.1
Embodied Carbon, kg CO2/kg material 3.5
22
Embodied Energy, MJ/kg 49
150
Embodied Water, L/kg 180
920

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
6.3
Resilience: Unit (Modulus of Resilience), kJ/m3 760
190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
58
Strength to Weight: Axial, points 28
29
Strength to Weight: Bending, points 24
38
Thermal Diffusivity, mm2/s 4.5
58
Thermal Shock Resistance, points 21
12

Alloy Composition

Carbon (C), % 0 to 0.040
0
Chromium (Cr), % 24.5 to 26.5
0
Copper (Cu), % 2.8 to 3.3
2.4 to 3.0
Iron (Fe), % 59.9 to 66.3
0
Magnesium (Mg), % 0
89.2 to 91.9
Manganese (Mn), % 0 to 1.0
0.25 to 0.75
Molybdenum (Mo), % 1.8 to 2.3
0
Nickel (Ni), % 4.8 to 6.0
0 to 0.010
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 0.2
Sulfur (S), % 0 to 0.040
0
Zinc (Zn), % 0
5.5 to 6.5
Residuals, % 0
0 to 0.3