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EN-MC21320 Magnesium vs. C68800 Brass

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C68800 brass belongs to the copper alloys. There are 29 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 C68800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 7.5
2.0 to 36
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
41
Shear Strength, MPa 130
380 to 510
Tensile Strength: Ultimate (UTS), MPa 230
570 to 890
Tensile Strength: Yield (Proof), MPa 140
390 to 790

Thermal Properties

Latent Heat of Fusion, J/g 370
190
Maximum Temperature: Mechanical, °C 110
160
Melting Completion (Liquidus), °C 600
960
Melting Onset (Solidus), °C 530
950
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 66
40
Thermal Expansion, µm/m-K 26
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
18
Electrical Conductivity: Equal Weight (Specific), % IACS 91
20

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.6
8.2
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
48
Embodied Water, L/kg 980
350

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
16 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 200
710 to 2860
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 72
19
Strength to Weight: Axial, points 38
19 to 30
Strength to Weight: Bending, points 50
19 to 25
Thermal Diffusivity, mm2/s 40
12
Thermal Shock Resistance, points 13
19 to 30

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
3.0 to 3.8
Cobalt (Co), % 0
0.25 to 0.55
Copper (Cu), % 0 to 0.010
70.8 to 75.5
Iron (Fe), % 0 to 0.0050
0 to 0.2
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0.5 to 1.5
0
Zinc (Zn), % 0 to 0.2
21.3 to 24.1
Residuals, % 0 to 0.010
0 to 0.5