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EN-MC21220 Magnesium vs. C68100 Brass

EN-MC21220 magnesium belongs to the magnesium alloys classification, while C68100 brass belongs to the copper alloys. There are 28 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 EN-MC21220 magnesium and the bottom bar is C68100 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 11
29
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 17
40
Tensile Strength: Ultimate (UTS), MPa 210
380
Tensile Strength: Yield (Proof), MPa 120
140

Thermal Properties

Latent Heat of Fusion, J/g 350
170
Maximum Temperature: Mechanical, °C 120
120
Melting Completion (Liquidus), °C 600
890
Melting Onset (Solidus), °C 540
870
Specific Heat Capacity, J/kg-K 1000
390
Thermal Conductivity, W/m-K 65
98
Thermal Expansion, µm/m-K 27
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
24
Electrical Conductivity: Equal Weight (Specific), % IACS 87
27

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 990
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
86
Resilience: Unit (Modulus of Resilience), kJ/m3 160
94
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 71
20
Strength to Weight: Axial, points 34
13
Strength to Weight: Bending, points 46
15
Thermal Diffusivity, mm2/s 39
32
Thermal Shock Resistance, points 12
13

Alloy Composition

Aluminum (Al), % 4.4 to 5.5
0 to 0.010
Copper (Cu), % 0 to 0.010
56 to 60
Iron (Fe), % 0 to 0.0050
0.25 to 1.3
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 93.5 to 95.5
0
Manganese (Mn), % 0.1 to 0.6
0.010 to 0.5
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.1
0.040 to 0.15
Tin (Sn), % 0
0.75 to 1.1
Zinc (Zn), % 0 to 0.3
36.4 to 43
Residuals, % 0 to 0.010
0 to 0.5