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EN-MC21320 Magnesium vs. C68300 Brass

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C68300 brass belongs to the copper alloys. There are 27 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-MC21320 magnesium and the bottom bar is C68300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 7.5
15
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Shear Strength, MPa 130
260
Tensile Strength: Ultimate (UTS), MPa 230
430
Tensile Strength: Yield (Proof), MPa 140
260

Thermal Properties

Latent Heat of Fusion, J/g 370
180
Maximum Temperature: Mechanical, °C 110
120
Melting Completion (Liquidus), °C 600
900
Melting Onset (Solidus), °C 530
890
Specific Heat Capacity, J/kg-K 1000
390
Thermal Conductivity, W/m-K 66
120
Thermal Expansion, µm/m-K 26
20

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.6
8.0
Embodied Carbon, kg CO2/kg material 23
2.8
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 980
340

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
56
Resilience: Unit (Modulus of Resilience), kJ/m3 200
330
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 72
20
Strength to Weight: Axial, points 38
15
Strength to Weight: Bending, points 50
16
Thermal Diffusivity, mm2/s 40
38
Thermal Shock Resistance, points 13
14

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Antimony (Sb), % 0
0.3 to 1.0
Cadmium (Cd), % 0
0 to 0.010
Copper (Cu), % 0 to 0.010
59 to 63
Iron (Fe), % 0 to 0.0050
0
Lead (Pb), % 0
0 to 0.090
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
0.3 to 1.0
Tin (Sn), % 0
0.050 to 0.2
Zinc (Zn), % 0 to 0.2
34.2 to 40.4
Residuals, % 0 to 0.010
0 to 0.5