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AZ91A Magnesium vs. C86100 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C86100 bronze belongs to the copper alloys. There are 28 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 C86100 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
20
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
43
Tensile Strength: Ultimate (UTS), MPa 240
660
Tensile Strength: Yield (Proof), MPa 160
350

Thermal Properties

Latent Heat of Fusion, J/g 360
200
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
940
Melting Onset (Solidus), °C 470
900
Specific Heat Capacity, J/kg-K 990
420
Thermal Conductivity, W/m-K 73
35
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 52
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 22
2.9
Embodied Energy, MJ/kg 160
49
Embodied Water, L/kg 990
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
530
Stiffness to Weight: Axial, points 15
7.8
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 38
23
Strength to Weight: Bending, points 49
21
Thermal Diffusivity, mm2/s 42
10
Thermal Shock Resistance, points 14
21

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
4.5 to 5.5
Copper (Cu), % 0 to 0.1
66 to 68
Iron (Fe), % 0
2.0 to 4.0
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
2.5 to 5.0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
17.3 to 25