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AZ91A Magnesium vs. C92200 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C92200 bronze belongs to the copper alloys. There are 30 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 AZ91A magnesium and the bottom bar is C92200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 160
180
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
25
Fatigue Strength, MPa 99
76
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
41
Tensile Strength: Ultimate (UTS), MPa 240
280
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
990
Melting Onset (Solidus), °C 470
830
Specific Heat Capacity, J/kg-K 990
370
Thermal Conductivity, W/m-K 73
70
Thermal Expansion, µm/m-K 26
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
14
Electrical Conductivity: Equal Weight (Specific), % IACS 52
14

Otherwise Unclassified Properties

Base Metal Price, % relative 12
32
Density, g/cm3 1.7
8.7
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
58
Resilience: Unit (Modulus of Resilience), kJ/m3 280
87
Stiffness to Weight: Axial, points 15
6.9
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
8.9
Strength to Weight: Bending, points 49
11
Thermal Diffusivity, mm2/s 42
21
Thermal Shock Resistance, points 14
9.9

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 0.1
86 to 90
Iron (Fe), % 0
0 to 0.25
Lead (Pb), % 0
1.0 to 2.0
Magnesium (Mg), % 88.2 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 1.5
Silicon (Si), % 0 to 0.5
0 to 0.0050
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
5.5 to 6.5
Zinc (Zn), % 0.35 to 1.0
3.0 to 5.0
Residuals, % 0
0 to 0.7