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EN-MC21220 Magnesium vs. C68400 Brass

EN-MC21220 magnesium belongs to the magnesium alloys classification, while C68400 brass belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 C68400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 58
150
Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 11
18
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 17
41
Shear Strength, MPa 120
330
Tensile Strength: Ultimate (UTS), MPa 210
540
Tensile Strength: Yield (Proof), MPa 120
310

Thermal Properties

Latent Heat of Fusion, J/g 350
210
Maximum Temperature: Mechanical, °C 120
130
Melting Completion (Liquidus), °C 600
840
Melting Onset (Solidus), °C 540
820
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 65
66
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 16
87
Electrical Conductivity: Equal Weight (Specific), % IACS 87
99

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
81
Resilience: Unit (Modulus of Resilience), kJ/m3 160
460
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 71
20
Strength to Weight: Axial, points 34
19
Strength to Weight: Bending, points 46
19
Thermal Diffusivity, mm2/s 39
21
Thermal Shock Resistance, points 12
18

Alloy Composition


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Aluminum (Al), % 4.4 to 5.5
0 to 0.5
Boron (B), % 0
0.0010 to 0.030
Copper (Cu), % 0 to 0.010
59 to 64
Iron (Fe), % 0 to 0.0050
0 to 1.0
Lead (Pb), % 0
0 to 0.090
Magnesium (Mg), % 93.5 to 95.5
0
Manganese (Mn), % 0.1 to 0.6
0.2 to 1.5
Nickel (Ni), % 0 to 0.0020
0 to 0.5
Phosphorus (P), % 0
0.030 to 0.3
Silicon (Si), % 0 to 0.1
1.5 to 2.5
Tin (Sn), % 0
0 to 0.5
Zinc (Zn), % 0 to 0.3
28.6 to 39.3
Residuals, % 0 to 0.010
0 to 0.5