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AZ91B Magnesium vs. CC498K Bronze

AZ91B magnesium belongs to the magnesium alloys classification, while CC498K bronze 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 AZ91B magnesium and the bottom bar is CC498K bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
78
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
14
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
41
Tensile Strength: Ultimate (UTS), MPa 240
260
Tensile Strength: Yield (Proof), MPa 160
130

Thermal Properties

Latent Heat of Fusion, J/g 360
190
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
1000
Melting Onset (Solidus), °C 470
920
Specific Heat Capacity, J/kg-K 990
370
Thermal Conductivity, W/m-K 73
73
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
10
Electrical Conductivity: Equal Weight (Specific), % IACS 58
10

Otherwise Unclassified Properties

Base Metal Price, % relative 12
32
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
52
Embodied Water, L/kg 990
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
30
Resilience: Unit (Modulus of Resilience), kJ/m3 280
72
Stiffness to Weight: Axial, points 15
6.9
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
8.1
Strength to Weight: Bending, points 49
10
Thermal Diffusivity, mm2/s 42
22
Thermal Shock Resistance, points 14
9.3

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.010
Antimony (Sb), % 0
0 to 0.25
Copper (Cu), % 0 to 0.35
85 to 90
Iron (Fe), % 0
0 to 0.25
Lead (Pb), % 0
1.0 to 2.0
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0 to 1.0
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0 to 0.5
0 to 0.010
Sulfur (S), % 0
0 to 0.1
Tin (Sn), % 0
5.5 to 6.5
Zinc (Zn), % 0.35 to 1.0
3.0 to 5.0