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AZ91D Magnesium vs. CC499K Bronze

AZ91D magnesium belongs to the magnesium alloys classification, while CC499K bronze belongs to the copper 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 AZ91D magnesium and the bottom bar is CC499K bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
73
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 2.3 to 4.5
13
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
41
Tensile Strength: Ultimate (UTS), MPa 160 to 220
260
Tensile Strength: Yield (Proof), MPa 80 to 130
120

Thermal Properties

Latent Heat of Fusion, J/g 350
190
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
1000
Melting Onset (Solidus), °C 490
920
Specific Heat Capacity, J/kg-K 990
370
Thermal Conductivity, W/m-K 78
73
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
12
Electrical Conductivity: Equal Weight (Specific), % IACS 58
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
32
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 22
3.1
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
27
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
65
Stiffness to Weight: Axial, points 15
6.9
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 26 to 34
8.1
Strength to Weight: Bending, points 38 to 46
10
Thermal Diffusivity, mm2/s 45
22
Thermal Shock Resistance, points 9.5 to 13
9.2

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.010
Antimony (Sb), % 0
0 to 0.1
Arsenic (As), % 0
0 to 0.030
Bismuth (Bi), % 0
0 to 0.020
Cadmium (Cd), % 0
0 to 0.020
Chromium (Cr), % 0
0 to 0.020
Copper (Cu), % 0 to 0.030
84 to 88
Iron (Fe), % 0 to 0.0050
0 to 0.3
Lead (Pb), % 0
0 to 3.0
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0
Nickel (Ni), % 0 to 0.0020
0 to 0.6
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 0.010
Sulfur (S), % 0
0 to 0.040
Tin (Sn), % 0
4.0 to 6.0
Zinc (Zn), % 0.35 to 1.0
4.0 to 6.0