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AS41B Magnesium vs. CC755S Brass

AS41B magnesium belongs to the magnesium alloys classification, while CC755S brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 AS41B magnesium and the bottom bar is CC755S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
100
Elongation at Break, % 6.0
9.5
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 210
390
Tensile Strength: Yield (Proof), MPa 140
250

Thermal Properties

Latent Heat of Fusion, J/g 370
170
Maximum Temperature: Mechanical, °C 110
120
Melting Completion (Liquidus), °C 620
820
Melting Onset (Solidus), °C 570
780
Specific Heat Capacity, J/kg-K 1000
390
Thermal Conductivity, W/m-K 68
120
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
27
Electrical Conductivity: Equal Weight (Specific), % IACS 92
30

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 980
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
33
Resilience: Unit (Modulus of Resilience), kJ/m3 220
290
Stiffness to Weight: Axial, points 15
7.1
Stiffness to Weight: Bending, points 72
19
Strength to Weight: Axial, points 35
14
Strength to Weight: Bending, points 47
15
Thermal Diffusivity, mm2/s 41
38
Thermal Shock Resistance, points 13
13

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0.4 to 0.7
Copper (Cu), % 0 to 0.020
59.5 to 61
Iron (Fe), % 0 to 0.0035
0.050 to 0.2
Lead (Pb), % 0
1.2 to 1.7
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0 to 0.050
Nickel (Ni), % 0 to 0.0020
0 to 0.2
Silicon (Si), % 0.5 to 1.5
0 to 0.050
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.12
35.8 to 38.9