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AZ91A Magnesium vs. C94500 Bronze

AZ91A magnesium belongs to the magnesium alloys classification, while C94500 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 C94500 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
50
Elastic (Young's, Tensile) Modulus, GPa 46
92
Elongation at Break, % 5.0
12
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 18
34
Tensile Strength: Ultimate (UTS), MPa 240
170
Tensile Strength: Yield (Proof), MPa 160
83

Thermal Properties

Latent Heat of Fusion, J/g 360
160
Maximum Temperature: Mechanical, °C 130
130
Melting Completion (Liquidus), °C 600
940
Melting Onset (Solidus), °C 470
800
Specific Heat Capacity, J/kg-K 990
330
Thermal Conductivity, W/m-K 73
52
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
10
Electrical Conductivity: Equal Weight (Specific), % IACS 52
9.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
30
Density, g/cm3 1.7
9.3
Embodied Carbon, kg CO2/kg material 22
3.2
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
17
Resilience: Unit (Modulus of Resilience), kJ/m3 280
37
Stiffness to Weight: Axial, points 15
5.5
Stiffness to Weight: Bending, points 69
16
Strength to Weight: Axial, points 38
5.2
Strength to Weight: Bending, points 49
7.4
Thermal Diffusivity, mm2/s 42
17
Thermal Shock Resistance, points 14
6.7

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.0050
Antimony (Sb), % 0
0 to 0.8
Copper (Cu), % 0 to 0.1
66.7 to 78
Iron (Fe), % 0
0 to 0.15
Lead (Pb), % 0
16 to 22
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0 to 1.0
Phosphorus (P), % 0
0 to 0.050
Silicon (Si), % 0 to 0.5
0 to 0.0050
Sulfur (S), % 0
0 to 0.080
Tin (Sn), % 0
6.0 to 8.0
Zinc (Zn), % 0.35 to 1.0
0 to 1.2