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EN-MC21220 Magnesium vs. C87700 Bronze

EN-MC21220 magnesium belongs to the magnesium alloys classification, while C87700 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-MC21220 magnesium and the bottom bar is C87700 bronze.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 11
3.6
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
42
Tensile Strength: Ultimate (UTS), MPa 210
300
Tensile Strength: Yield (Proof), MPa 120
120

Thermal Properties

Latent Heat of Fusion, J/g 350
250
Maximum Temperature: Mechanical, °C 120
180
Melting Completion (Liquidus), °C 600
980
Melting Onset (Solidus), °C 540
900
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 65
120
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
45
Electrical Conductivity: Equal Weight (Specific), % IACS 87
48

Otherwise Unclassified Properties

Base Metal Price, % relative 12
29
Density, g/cm3 1.7
8.5
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
45
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 160
64
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 71
19
Strength to Weight: Axial, points 34
9.8
Strength to Weight: Bending, points 46
12
Thermal Diffusivity, mm2/s 39
34
Thermal Shock Resistance, points 12
11

Alloy Composition


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Aluminum (Al), % 4.4 to 5.5
0
Antimony (Sb), % 0
0 to 0.1
Copper (Cu), % 0 to 0.010
87.5 to 90.5
Iron (Fe), % 0 to 0.0050
0 to 0.5
Lead (Pb), % 0
0 to 0.090
Magnesium (Mg), % 93.5 to 95.5
0
Manganese (Mn), % 0.1 to 0.6
0 to 0.8
Nickel (Ni), % 0 to 0.0020
0 to 0.25
Phosphorus (P), % 0
0 to 0.15
Silicon (Si), % 0 to 0.1
2.5 to 3.5
Tin (Sn), % 0
0 to 2.0
Zinc (Zn), % 0 to 0.3
7.0 to 9.0
Residuals, % 0 to 0.010
0 to 0.8