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EN-MC21320 Magnesium vs. C69700 Brass

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C69700 brass belongs to the copper alloys. There are 27 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 C69700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 7.5
25
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
41
Shear Strength, MPa 130
300
Tensile Strength: Ultimate (UTS), MPa 230
470
Tensile Strength: Yield (Proof), MPa 140
230

Thermal Properties

Latent Heat of Fusion, J/g 370
240
Maximum Temperature: Mechanical, °C 110
160
Melting Completion (Liquidus), °C 600
930
Melting Onset (Solidus), °C 530
880
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 66
43
Thermal Expansion, µm/m-K 26
19

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 1.6
8.3
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 980
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
99
Resilience: Unit (Modulus of Resilience), kJ/m3 200
250
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 72
19
Strength to Weight: Axial, points 38
16
Strength to Weight: Bending, points 50
16
Thermal Diffusivity, mm2/s 40
13
Thermal Shock Resistance, points 13
16

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0
Copper (Cu), % 0 to 0.010
75 to 80
Iron (Fe), % 0 to 0.0050
0 to 0.2
Lead (Pb), % 0
0.5 to 1.5
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0 to 0.4
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0.5 to 1.5
2.5 to 3.5
Zinc (Zn), % 0 to 0.2
13.9 to 22
Residuals, % 0 to 0.010
0 to 0.5