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C72900 Copper-nickel vs. ZK51A Magnesium

C72900 copper-nickel belongs to the copper alloys classification, while ZK51A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 C72900 copper-nickel and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
45
Elongation at Break, % 6.0 to 20
4.7
Poisson's Ratio 0.34
0.29
Shear Modulus, GPa 45
18
Shear Strength, MPa 540 to 630
160
Tensile Strength: Ultimate (UTS), MPa 870 to 1080
240
Tensile Strength: Yield (Proof), MPa 700 to 920
150

Thermal Properties

Latent Heat of Fusion, J/g 210
340
Maximum Temperature: Mechanical, °C 210
120
Melting Completion (Liquidus), °C 1120
640
Melting Onset (Solidus), °C 950
550
Specific Heat Capacity, J/kg-K 380
970
Thermal Conductivity, W/m-K 29
110
Thermal Expansion, µm/m-K 17
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
28
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
140

Otherwise Unclassified Properties

Base Metal Price, % relative 39
13
Density, g/cm3 8.8
1.8
Embodied Carbon, kg CO2/kg material 4.6
24
Embodied Energy, MJ/kg 72
160
Embodied Water, L/kg 360
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 49 to 210
10
Resilience: Unit (Modulus of Resilience), kJ/m3 2030 to 3490
260
Stiffness to Weight: Axial, points 7.6
14
Stiffness to Weight: Bending, points 19
64
Strength to Weight: Axial, points 27 to 34
36
Strength to Weight: Bending, points 23 to 27
47
Thermal Diffusivity, mm2/s 8.6
61
Thermal Shock Resistance, points 31 to 38
15

Alloy Composition

Copper (Cu), % 74.1 to 78
0 to 0.1
Iron (Fe), % 0 to 0.5
0
Lead (Pb), % 0 to 0.020
0
Magnesium (Mg), % 0 to 0.15
93.1 to 95.9
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 14.5 to 15.5
0 to 0.010
Niobium (Nb), % 0 to 0.1
0
Tin (Sn), % 7.5 to 8.5
0
Zinc (Zn), % 0 to 0.5
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3