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C81400 Copper vs. ZK51A Magnesium

C81400 copper belongs to the copper alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, 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 C81400 copper and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
45
Elongation at Break, % 11
4.7
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 41
18
Tensile Strength: Ultimate (UTS), MPa 370
240
Tensile Strength: Yield (Proof), MPa 250
150

Thermal Properties

Latent Heat of Fusion, J/g 210
340
Maximum Temperature: Mechanical, °C 200
120
Melting Completion (Liquidus), °C 1090
640
Melting Onset (Solidus), °C 1070
550
Specific Heat Capacity, J/kg-K 390
970
Thermal Conductivity, W/m-K 260
110
Thermal Expansion, µm/m-K 17
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 60
28
Electrical Conductivity: Equal Weight (Specific), % IACS 61
140

Otherwise Unclassified Properties

Base Metal Price, % relative 33
13
Density, g/cm3 8.9
1.8
Embodied Carbon, kg CO2/kg material 2.8
24
Embodied Energy, MJ/kg 45
160
Embodied Water, L/kg 310
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
10
Resilience: Unit (Modulus of Resilience), kJ/m3 260
260
Stiffness to Weight: Axial, points 7.3
14
Stiffness to Weight: Bending, points 18
64
Strength to Weight: Axial, points 11
36
Strength to Weight: Bending, points 13
47
Thermal Diffusivity, mm2/s 75
61
Thermal Shock Resistance, points 13
15

Alloy Composition

Beryllium (Be), % 0.020 to 0.1
0
Chromium (Cr), % 0.6 to 1.0
0
Copper (Cu), % 98.4 to 99.38
0 to 0.1
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0
0 to 0.010
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3