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AZ91A Magnesium vs. C87200 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C87200 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 C87200 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
85
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
30
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Tensile Strength: Ultimate (UTS), MPa 240
380
Tensile Strength: Yield (Proof), MPa 160
170

Thermal Properties

Latent Heat of Fusion, J/g 360
260
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
970
Melting Onset (Solidus), °C 470
860
Specific Heat Capacity, J/kg-K 990
410
Thermal Conductivity, W/m-K 73
28
Thermal Expansion, µm/m-K 26
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
6.0
Electrical Conductivity: Equal Weight (Specific), % IACS 52
6.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.6
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
93
Resilience: Unit (Modulus of Resilience), kJ/m3 280
130
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
12
Strength to Weight: Bending, points 49
14
Thermal Diffusivity, mm2/s 42
8.0
Thermal Shock Resistance, points 14
14

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 1.5
Copper (Cu), % 0 to 0.1
89 to 99
Iron (Fe), % 0
0 to 2.5
Lead (Pb), % 0
0 to 0.5
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0 to 1.5
Nickel (Ni), % 0 to 0.030
0
Phosphorus (P), % 0
0 to 0.5
Silicon (Si), % 0 to 0.5
1.0 to 5.0
Tin (Sn), % 0
0 to 1.0
Zinc (Zn), % 0.35 to 1.0
0 to 5.0