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AZ91B Magnesium vs. C92600 Bronze

AZ91B magnesium belongs to the magnesium alloys classification, while C92600 bronze belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 C92600 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
70
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
30
Poisson's Ratio 0.29
0.34
Rockwell F Hardness 75
78
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 240
300
Tensile Strength: Yield (Proof), MPa 160
140

Thermal Properties

Latent Heat of Fusion, J/g 360
190
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
980
Melting Onset (Solidus), °C 470
840
Specific Heat Capacity, J/kg-K 990
370
Thermal Conductivity, W/m-K 73
67
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
9.0
Electrical Conductivity: Equal Weight (Specific), % IACS 58
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
34
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
3.6
Embodied Energy, MJ/kg 160
58
Embodied Water, L/kg 990
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
74
Resilience: Unit (Modulus of Resilience), kJ/m3 280
88
Stiffness to Weight: Axial, points 15
6.8
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
9.6
Strength to Weight: Bending, points 49
11
Thermal Diffusivity, mm2/s 42
21
Thermal Shock Resistance, points 14
11

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0 to 0.0050
Antimony (Sb), % 0
0 to 0.25
Copper (Cu), % 0 to 0.35
86 to 88.5
Iron (Fe), % 0
0 to 0.2
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0 to 0.7
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
9.3 to 10.5
Zinc (Zn), % 0.35 to 1.0
1.3 to 2.5
Residuals, % 0
0 to 0.7