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AZ91A Magnesium vs. C31600 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C31600 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 C31600 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
6.7 to 28
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
42
Shear Strength, MPa 140
170 to 270
Tensile Strength: Ultimate (UTS), MPa 240
270 to 460
Tensile Strength: Yield (Proof), MPa 160
80 to 390

Thermal Properties

Latent Heat of Fusion, J/g 360
200
Maximum Temperature: Mechanical, °C 130
180
Melting Completion (Liquidus), °C 600
1040
Melting Onset (Solidus), °C 470
1010
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
140
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
32
Electrical Conductivity: Equal Weight (Specific), % IACS 52
33

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
43
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
30 to 58
Resilience: Unit (Modulus of Resilience), kJ/m3 280
28 to 690
Stiffness to Weight: Axial, points 15
7.1
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
8.5 to 15
Strength to Weight: Bending, points 49
11 to 15
Thermal Diffusivity, mm2/s 42
42
Thermal Shock Resistance, points 14
9.4 to 16

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
87.5 to 90.5
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
1.3 to 2.5
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0.7 to 1.2
Phosphorus (P), % 0
0.040 to 0.1
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
5.2 to 10.5
Residuals, % 0
0 to 0.4