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EN-MC65220 Magnesium vs. C66700 Brass

EN-MC65220 magnesium belongs to the magnesium alloys classification, while C66700 brass belongs to the copper alloys. There are 28 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-MC65220 magnesium and the bottom bar is C66700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
110
Elongation at Break, % 2.2
2.0 to 58
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 17
41
Shear Strength, MPa 150
250 to 530
Tensile Strength: Ultimate (UTS), MPa 270
340 to 690
Tensile Strength: Yield (Proof), MPa 200
100 to 640

Thermal Properties

Latent Heat of Fusion, J/g 340
180
Maximum Temperature: Mechanical, °C 160
140
Melting Completion (Liquidus), °C 610
1090
Melting Onset (Solidus), °C 550
1050
Specific Heat Capacity, J/kg-K 980
390
Thermal Conductivity, W/m-K 110
97
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
17
Electrical Conductivity: Equal Weight (Specific), % IACS 120
19

Otherwise Unclassified Properties

Base Metal Price, % relative 80
25
Density, g/cm3 1.9
8.2
Embodied Carbon, kg CO2/kg material 27
2.7
Embodied Energy, MJ/kg 210
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.5
13 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 450
49 to 1900
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 62
19
Strength to Weight: Axial, points 40
11 to 23
Strength to Weight: Bending, points 49
13 to 21
Thermal Diffusivity, mm2/s 61
30
Thermal Shock Resistance, points 17
11 to 23

Alloy Composition


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Copper (Cu), % 0.050 to 0.1
68.5 to 71.5
Iron (Fe), % 0 to 0.010
0 to 0.1
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 93.8 to 96.8
0
Manganese (Mn), % 0 to 0.15
0.8 to 1.5
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0 to 0.010
0
Silver (Ag), % 1.3 to 1.7
0
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0 to 0.2
26.3 to 30.7
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.010
0 to 0.5