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AZ81A Magnesium vs. C93200 Bronze

AZ81A magnesium belongs to the magnesium alloys classification, while C93200 bronze belongs to the copper alloys. There are 31 material properties with values for both materials. Properties with values for just one material (3, 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 AZ81A magnesium and the bottom bar is C93200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 310 to 370
320
Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 3.0 to 8.8
20
Fatigue Strength, MPa 78 to 80
110
Poisson's Ratio 0.29
0.35
Shear Modulus, GPa 18
38
Tensile Strength: Ultimate (UTS), MPa 160 to 240
240
Tensile Strength: Yield (Proof), MPa 84
130

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 130
160
Melting Completion (Liquidus), °C 600
980
Melting Onset (Solidus), °C 500
850
Solidification (Pattern Maker's) Shrinkage, % 1.3
1.8
Specific Heat Capacity, J/kg-K 990
360
Thermal Conductivity, W/m-K 84
59
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
12
Electrical Conductivity: Equal Weight (Specific), % IACS 65
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
32
Density, g/cm3 1.7
8.8
Embodied Carbon, kg CO2/kg material 23
3.2
Embodied Energy, MJ/kg 160
52
Embodied Water, L/kg 990
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
40
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
76
Stiffness to Weight: Axial, points 15
6.5
Stiffness to Weight: Bending, points 70
18
Strength to Weight: Axial, points 26 to 39
7.5
Strength to Weight: Bending, points 38 to 50
9.7
Thermal Diffusivity, mm2/s 50
18
Thermal Shock Resistance, points 9.1 to 14
9.3

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0 to 0.0050
Antimony (Sb), % 0
0 to 0.35
Copper (Cu), % 0 to 0.1
81 to 85
Iron (Fe), % 0
0 to 0.2
Lead (Pb), % 0
6.0 to 8.0
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0 to 1.0
Phosphorus (P), % 0
0 to 1.5
Silicon (Si), % 0 to 0.3
0 to 0.0050
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
6.3 to 7.5
Zinc (Zn), % 0.4 to 1.0
2.0 to 4.0
Residuals, % 0 to 0.3
0 to 1.0