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AZ91A Magnesium vs. C51900 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C51900 bronze belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 C51900 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
14 to 29
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
42
Shear Strength, MPa 140
320 to 370
Tensile Strength: Ultimate (UTS), MPa 240
380 to 620
Tensile Strength: Yield (Proof), MPa 160
390 to 570

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
930
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
66
Thermal Expansion, µm/m-K 26
18

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
33
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
55 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 280
680 to 1450
Stiffness to Weight: Axial, points 15
7.0
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
12 to 19
Strength to Weight: Bending, points 49
13 to 18
Thermal Diffusivity, mm2/s 42
20
Thermal Shock Resistance, points 14
14 to 22

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
91.7 to 95
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0.030 to 0.35
Silicon (Si), % 0 to 0.5
0
Tin (Sn), % 0
5.0 to 7.0
Zinc (Zn), % 0.35 to 1.0
0 to 0.3
Residuals, % 0
0 to 0.5