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EN-MC21320 Magnesium vs. C68400 Brass

EN-MC21320 magnesium belongs to the magnesium alloys classification, while C68400 brass belongs to the copper alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, 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 C68400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 68
150
Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 7.5
18
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
41
Shear Strength, MPa 130
330
Tensile Strength: Ultimate (UTS), MPa 230
540
Tensile Strength: Yield (Proof), MPa 140
310

Thermal Properties

Latent Heat of Fusion, J/g 370
210
Maximum Temperature: Mechanical, °C 110
130
Melting Completion (Liquidus), °C 600
840
Melting Onset (Solidus), °C 530
820
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 66
66
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
87
Electrical Conductivity: Equal Weight (Specific), % IACS 91
99

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.6
7.9
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 980
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 15
81
Resilience: Unit (Modulus of Resilience), kJ/m3 200
460
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 72
20
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 50
19
Thermal Diffusivity, mm2/s 40
21
Thermal Shock Resistance, points 13
18

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0 to 0.5
Boron (B), % 0
0.0010 to 0.030
Copper (Cu), % 0 to 0.010
59 to 64
Iron (Fe), % 0 to 0.0050
0 to 1.0
Lead (Pb), % 0
0 to 0.090
Magnesium (Mg), % 92.5 to 95.9
0
Manganese (Mn), % 0.1 to 0.7
0.2 to 1.5
Nickel (Ni), % 0 to 0.0020
0 to 0.5
Phosphorus (P), % 0
0.030 to 0.3
Silicon (Si), % 0.5 to 1.5
1.5 to 2.5
Tin (Sn), % 0
0 to 0.5
Zinc (Zn), % 0 to 0.2
28.6 to 39.3
Residuals, % 0 to 0.010
0 to 0.5