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AZ91A Magnesium vs. C99300 Copper

AZ91A magnesium belongs to the magnesium alloys classification, while C99300 copper 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 AZ91A magnesium and the bottom bar is C99300 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
200
Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
2.0
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
46
Tensile Strength: Ultimate (UTS), MPa 240
660
Tensile Strength: Yield (Proof), MPa 160
380

Thermal Properties

Latent Heat of Fusion, J/g 360
240
Maximum Temperature: Mechanical, °C 130
250
Melting Completion (Liquidus), °C 600
1080
Melting Onset (Solidus), °C 470
1070
Specific Heat Capacity, J/kg-K 990
450
Thermal Conductivity, W/m-K 73
43
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 52
9.8

Otherwise Unclassified Properties

Base Metal Price, % relative 12
35
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 22
4.5
Embodied Energy, MJ/kg 160
70
Embodied Water, L/kg 990
400

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
11
Resilience: Unit (Modulus of Resilience), kJ/m3 280
590
Stiffness to Weight: Axial, points 15
8.3
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 38
22
Strength to Weight: Bending, points 49
20
Thermal Diffusivity, mm2/s 42
12
Thermal Shock Resistance, points 14
22

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
10.7 to 11.5
Cobalt (Co), % 0
1.0 to 2.0
Copper (Cu), % 0 to 0.1
68.6 to 74.4
Iron (Fe), % 0
0.4 to 1.0
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
13.5 to 16.5
Silicon (Si), % 0 to 0.5
0 to 0.020
Tin (Sn), % 0
0 to 0.050
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
0 to 0.3