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EN-MC21320 Magnesium vs. C85700 Brass

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C85700 brass 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-MC21320 magnesium and the bottom bar is C85700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 7.5
17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 230
310
Tensile Strength: Yield (Proof), MPa 140
110

Thermal Properties

Latent Heat of Fusion, J/g 370
170
Maximum Temperature: Mechanical, °C 110
120
Melting Completion (Liquidus), °C 600
940
Melting Onset (Solidus), °C 530
910
Specific Heat Capacity, J/kg-K 1000
380
Thermal Conductivity, W/m-K 66
84
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
22
Electrical Conductivity: Equal Weight (Specific), % IACS 91
25

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.6
8.0
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 980
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
41
Resilience: Unit (Modulus of Resilience), kJ/m3 200
59
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 72
20
Strength to Weight: Axial, points 38
11
Strength to Weight: Bending, points 50
13
Thermal Diffusivity, mm2/s 40
27
Thermal Shock Resistance, points 13
10

Alloy Composition


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Aluminum (Al), % 3.5 to 5.0
0 to 0.8
Copper (Cu), % 0 to 0.010
58 to 64
Iron (Fe), % 0 to 0.0050
0 to 0.7
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0 to 1.0
Silicon (Si), % 0.5 to 1.5
0 to 0.050
Tin (Sn), % 0
0.5 to 1.5
Zinc (Zn), % 0 to 0.2
32 to 40
Residuals, % 0 to 0.010
0 to 1.3