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AS41B Magnesium vs. CC765S Brass

AS41B magnesium belongs to the magnesium alloys classification, while CC765S 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 CC765S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 6.0
21
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
42
Tensile Strength: Ultimate (UTS), MPa 210
540
Tensile Strength: Yield (Proof), MPa 140
220

Thermal Properties

Latent Heat of Fusion, J/g 370
180
Maximum Temperature: Mechanical, °C 110
140
Melting Completion (Liquidus), °C 620
860
Melting Onset (Solidus), °C 570
820
Specific Heat Capacity, J/kg-K 1000
400
Thermal Conductivity, W/m-K 68
91
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
30
Electrical Conductivity: Equal Weight (Specific), % IACS 92
34

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 23
3.0
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 980
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
90
Resilience: Unit (Modulus of Resilience), kJ/m3 220
220
Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 72
20
Strength to Weight: Axial, points 35
19
Strength to Weight: Bending, points 47
18
Thermal Diffusivity, mm2/s 41
28
Thermal Shock Resistance, points 13
17

Alloy Composition

Aluminum (Al), % 3.5 to 5.0
0.5 to 2.5
Antimony (Sb), % 0
0 to 0.080
Copper (Cu), % 0 to 0.020
51 to 65
Iron (Fe), % 0 to 0.0035
0.5 to 2.0
Lead (Pb), % 0
0 to 0.5
Magnesium (Mg), % 92.7 to 95.7
0
Manganese (Mn), % 0.35 to 0.7
0.3 to 3.0
Nickel (Ni), % 0 to 0.0020
0 to 6.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.5
0 to 0.1
Tin (Sn), % 0
0 to 1.0
Zinc (Zn), % 0 to 0.12
19.8 to 47.7