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AZ91D Magnesium vs. CC765S Brass

AZ91D magnesium belongs to the magnesium alloys classification, while CC765S brass belongs to the copper alloys. There are 29 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 AZ91D magnesium and the bottom bar is CC765S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
130
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 2.3 to 4.5
21
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
42
Tensile Strength: Ultimate (UTS), MPa 160 to 220
540
Tensile Strength: Yield (Proof), MPa 80 to 130
220

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 130
140
Melting Completion (Liquidus), °C 600
860
Melting Onset (Solidus), °C 490
820
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 78
91
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
30
Electrical Conductivity: Equal Weight (Specific), % IACS 58
34

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.7
8.0
Embodied Carbon, kg CO2/kg material 22
3.0
Embodied Energy, MJ/kg 160
51
Embodied Water, L/kg 990
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
90
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
220
Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 26 to 34
19
Strength to Weight: Bending, points 38 to 46
18
Thermal Diffusivity, mm2/s 45
28
Thermal Shock Resistance, points 9.5 to 13
17

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0.5 to 2.5
Antimony (Sb), % 0
0 to 0.080
Copper (Cu), % 0 to 0.030
51 to 65
Iron (Fe), % 0 to 0.0050
0.5 to 2.0
Lead (Pb), % 0
0 to 0.5
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
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 to 0.1
0 to 0.1
Tin (Sn), % 0
0 to 1.0
Zinc (Zn), % 0.35 to 1.0
19.8 to 47.7