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EN-MC21230 Magnesium vs. C69430 Brass

EN-MC21230 magnesium belongs to the magnesium alloys classification, while C69430 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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-MC21230 magnesium and the bottom bar is C69430 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 10
17
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
42
Shear Strength, MPa 130
350
Tensile Strength: Ultimate (UTS), MPa 220
570
Tensile Strength: Yield (Proof), MPa 140
280

Thermal Properties

Latent Heat of Fusion, J/g 350
260
Maximum Temperature: Mechanical, °C 120
170
Melting Completion (Liquidus), °C 600
920
Melting Onset (Solidus), °C 520
820
Specific Heat Capacity, J/kg-K 1000
410
Thermal Conductivity, W/m-K 72
26
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 63
6.7

Otherwise Unclassified Properties

Base Metal Price, % relative 12
27
Density, g/cm3 1.7
8.3
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 990
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 19
80
Resilience: Unit (Modulus of Resilience), kJ/m3 200
340
Stiffness to Weight: Axial, points 15
7.4
Stiffness to Weight: Bending, points 71
19
Strength to Weight: Axial, points 36
19
Strength to Weight: Bending, points 48
18
Thermal Diffusivity, mm2/s 43
7.7
Thermal Shock Resistance, points 13
20

Alloy Composition

Aluminum (Al), % 5.5 to 8.5
0
Arsenic (As), % 0
0.030 to 0.060
Copper (Cu), % 0 to 0.010
80 to 83
Iron (Fe), % 0 to 0.0050
0 to 0.2
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 90.5 to 94.4
0
Manganese (Mn), % 0.1 to 0.6
0
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.1
3.5 to 4.5
Zinc (Zn), % 0 to 0.3
11.4 to 16.5
Residuals, % 0 to 0.010
0 to 0.5