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AZ91A Magnesium vs. C38500 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C38500 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 AZ91A magnesium and the bottom bar is C38500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 5.0
17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
37
Shear Strength, MPa 140
230
Tensile Strength: Ultimate (UTS), MPa 240
370
Tensile Strength: Yield (Proof), MPa 160
130

Thermal Properties

Latent Heat of Fusion, J/g 360
160
Maximum Temperature: Mechanical, °C 130
110
Melting Completion (Liquidus), °C 600
890
Melting Onset (Solidus), °C 470
880
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
120
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
28
Electrical Conductivity: Equal Weight (Specific), % IACS 52
31

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 22
2.6
Embodied Energy, MJ/kg 160
45
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
48
Resilience: Unit (Modulus of Resilience), kJ/m3 280
78
Stiffness to Weight: Axial, points 15
7.0
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
13
Strength to Weight: Bending, points 49
14
Thermal Diffusivity, mm2/s 42
40
Thermal Shock Resistance, points 14
12

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
55 to 59
Iron (Fe), % 0
0 to 0.35
Lead (Pb), % 0
2.5 to 3.5
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
36.7 to 42.5
Residuals, % 0
0 to 0.5