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EN-MC21320 Magnesium vs. C87800 Brass

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C87800 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-MC21320 magnesium and the bottom bar is C87800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 7.5
25
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
42
Tensile Strength: Ultimate (UTS), MPa 230
590
Tensile Strength: Yield (Proof), MPa 140
350

Thermal Properties

Latent Heat of Fusion, J/g 370
260
Maximum Temperature: Mechanical, °C 110
170
Melting Completion (Liquidus), °C 600
920
Melting Onset (Solidus), °C 530
820
Specific Heat Capacity, J/kg-K 1000
410
Thermal Conductivity, W/m-K 66
28
Thermal Expansion, µm/m-K 26
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 91
7.3

Otherwise Unclassified Properties

Base Metal Price, % relative 12
27
Density, g/cm3 1.6
8.3
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 980
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
130
Resilience: Unit (Modulus of Resilience), kJ/m3 200
540
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 72
19
Strength to Weight: Axial, points 38
20
Strength to Weight: Bending, points 50
19
Thermal Diffusivity, mm2/s 40
8.3
Thermal Shock Resistance, points 13
21

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0 to 0.15
Antimony (Sb), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Copper (Cu), % 0 to 0.010
80 to 84.2
Iron (Fe), % 0 to 0.0050
0 to 0.15
Lead (Pb), % 0
0 to 0.15
Magnesium (Mg), % 92.5 to 95.9
0 to 0.010
Manganese (Mn), % 0.1 to 0.7
0 to 0.15
Nickel (Ni), % 0 to 0.0020
0 to 0.2
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0.5 to 1.5
3.8 to 4.2
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0
0 to 0.25
Zinc (Zn), % 0 to 0.2
12 to 16
Residuals, % 0 to 0.010
0 to 0.5