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EN-MC65120 Magnesium vs. C68700 Brass

EN-MC65120 magnesium belongs to the magnesium alloys classification, while C68700 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, 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-MC65120 magnesium and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
41
Tensile Strength: Ultimate (UTS), MPa 160
390
Tensile Strength: Yield (Proof), MPa 110
140

Thermal Properties

Latent Heat of Fusion, J/g 330
190
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 590
970
Melting Onset (Solidus), °C 520
930
Specific Heat Capacity, J/kg-K 970
400
Thermal Conductivity, W/m-K 100
100
Thermal Expansion, µm/m-K 26
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
23
Electrical Conductivity: Equal Weight (Specific), % IACS 120
25

Otherwise Unclassified Properties

Base Metal Price, % relative 25
26
Density, g/cm3 1.9
8.3
Embodied Carbon, kg CO2/kg material 25
2.8
Embodied Energy, MJ/kg 190
46
Embodied Water, L/kg 930
340

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 140
90
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 62
19
Strength to Weight: Axial, points 23
13
Strength to Weight: Bending, points 34
14
Thermal Diffusivity, mm2/s 56
30
Thermal Shock Resistance, points 9.8
13

Alloy Composition


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Aluminum (Al), % 0
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Copper (Cu), % 0 to 0.030
76 to 79
Iron (Fe), % 0 to 0.010
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 91.8 to 95.1
0
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.010
0
Unspecified Rare Earths, % 2.5 to 4.0
0
Zinc (Zn), % 2.0 to 3.0
17.8 to 22.2
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0 to 0.5