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AZ91B Magnesium vs. CC331G Bronze

AZ91B magnesium belongs to the magnesium alloys classification, while CC331G 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 AZ91B magnesium and the bottom bar is CC331G bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
140
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
20
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
43
Tensile Strength: Ultimate (UTS), MPa 240
620
Tensile Strength: Yield (Proof), MPa 160
240

Thermal Properties

Latent Heat of Fusion, J/g 360
230
Maximum Temperature: Mechanical, °C 130
220
Melting Completion (Liquidus), °C 600
1060
Melting Onset (Solidus), °C 470
1000
Specific Heat Capacity, J/kg-K 990
440
Thermal Conductivity, W/m-K 73
61
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
13
Electrical Conductivity: Equal Weight (Specific), % IACS 58
14

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
53
Embodied Water, L/kg 990
390

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
97
Resilience: Unit (Modulus of Resilience), kJ/m3 280
250
Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
21
Strength to Weight: Bending, points 49
19
Thermal Diffusivity, mm2/s 42
17
Thermal Shock Resistance, points 14
22

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
8.5 to 10.5
Copper (Cu), % 0 to 0.35
83 to 86.5
Iron (Fe), % 0
1.5 to 3.5
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 87.9 to 91.2
0 to 0.050
Manganese (Mn), % 0.13 to 0.5
0 to 1.0
Nickel (Ni), % 0 to 0.030
0 to 1.5
Silicon (Si), % 0 to 0.5
0 to 0.2
Tin (Sn), % 0
0 to 0.2
Zinc (Zn), % 0.35 to 1.0
0 to 0.5