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AZ91A Magnesium vs. C99600 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C99600 bronze belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (9, 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 C99600 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
150
Elongation at Break, % 5.0
27 to 34
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
56
Tensile Strength: Ultimate (UTS), MPa 240
560
Tensile Strength: Yield (Proof), MPa 160
250 to 300

Thermal Properties

Latent Heat of Fusion, J/g 360
240
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
1100
Melting Onset (Solidus), °C 470
1050
Specific Heat Capacity, J/kg-K 990
440
Thermal Expansion, µm/m-K 26
19

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
130 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
210 to 310
Stiffness to Weight: Axial, points 15
10
Stiffness to Weight: Bending, points 69
22
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 49
19
Thermal Shock Resistance, points 14
14

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
1.0 to 2.8
Carbon (C), % 0
0 to 0.050
Cobalt (Co), % 0
0 to 0.2
Copper (Cu), % 0 to 0.1
50.8 to 60
Iron (Fe), % 0
0 to 0.2
Lead (Pb), % 0
0 to 0.020
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
39 to 45
Nickel (Ni), % 0 to 0.030
0 to 0.2
Silicon (Si), % 0 to 0.5
0 to 0.1
Tin (Sn), % 0
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
0 to 0.2
Residuals, % 0
0 to 0.3