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AZ81A Magnesium vs. C74400 Nickel Silver

AZ81A magnesium belongs to the magnesium alloys classification, while C74400 nickel silver belongs to the copper alloys. There are 29 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 AZ81A magnesium and the bottom bar is C74400 nickel silver.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 3.0 to 8.8
43
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
39
Shear Strength, MPa 91 to 130
240
Tensile Strength: Ultimate (UTS), MPa 160 to 240
350
Tensile Strength: Yield (Proof), MPa 84
120

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 130
140
Melting Completion (Liquidus), °C 600
930
Melting Onset (Solidus), °C 500
910
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
120
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
26
Electrical Conductivity: Equal Weight (Specific), % IACS 65
29

Otherwise Unclassified Properties

Base Metal Price, % relative 12
25
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 23
2.9
Embodied Energy, MJ/kg 160
48
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
120
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
63
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
12
Strength to Weight: Bending, points 38 to 50
14
Thermal Diffusivity, mm2/s 50
37
Thermal Shock Resistance, points 9.1 to 14
12

Alloy Composition

Aluminum (Al), % 7.0 to 8.1
0
Copper (Cu), % 0 to 0.1
62 to 66
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
2.0 to 4.0
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0.4 to 1.0
29.6 to 36
Residuals, % 0 to 0.3
0 to 0.3