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EN-MC21320 Magnesium vs. C95700 Bronze

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C95700 bronze belongs to the copper alloys. There are 28 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 EN-MC21320 magnesium and the bottom bar is C95700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
130
Elongation at Break, % 7.5
23
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 18
47
Tensile Strength: Ultimate (UTS), MPa 230
680
Tensile Strength: Yield (Proof), MPa 140
310

Thermal Properties

Latent Heat of Fusion, J/g 370
230
Maximum Temperature: Mechanical, °C 110
220
Melting Completion (Liquidus), °C 600
990
Melting Onset (Solidus), °C 530
950
Specific Heat Capacity, J/kg-K 1000
440
Thermal Conductivity, W/m-K 66
12
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 91
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.6
8.2
Embodied Carbon, kg CO2/kg material 23
3.3
Embodied Energy, MJ/kg 160
54
Embodied Water, L/kg 980
360

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
130
Resilience: Unit (Modulus of Resilience), kJ/m3 200
390
Stiffness to Weight: Axial, points 15
8.5
Stiffness to Weight: Bending, points 72
20
Strength to Weight: Axial, points 38
23
Strength to Weight: Bending, points 50
21
Thermal Diffusivity, mm2/s 40
3.3
Thermal Shock Resistance, points 13
21

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
7.0 to 8.5
Copper (Cu), % 0 to 0.010
71 to 78.5
Iron (Fe), % 0 to 0.0050
2.0 to 4.0
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
11 to 14
Nickel (Ni), % 0 to 0.0020
1.5 to 3.0
Silicon (Si), % 0.5 to 1.5
0 to 0.1
Zinc (Zn), % 0 to 0.2
0
Residuals, % 0 to 0.010
0 to 0.5