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AZ91D Magnesium vs. CC764S Brass

AZ91D magnesium belongs to the magnesium alloys classification, while CC764S 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 CC764S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
160
Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 2.3 to 4.5
15
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
41
Tensile Strength: Ultimate (UTS), MPa 160 to 220
680
Tensile Strength: Yield (Proof), MPa 80 to 130
290

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 130
130
Melting Completion (Liquidus), °C 600
850
Melting Onset (Solidus), °C 490
810
Specific Heat Capacity, J/kg-K 990
400
Thermal Conductivity, W/m-K 78
94
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
32
Electrical Conductivity: Equal Weight (Specific), % IACS 58
36

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
2.9
Embodied Energy, MJ/kg 160
49
Embodied Water, L/kg 990
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
80
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
390
Stiffness to Weight: Axial, points 15
7.6
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 26 to 34
24
Strength to Weight: Bending, points 38 to 46
22
Thermal Diffusivity, mm2/s 45
30
Thermal Shock Resistance, points 9.5 to 13
22

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
1.0 to 3.0
Antimony (Sb), % 0
0 to 0.050
Copper (Cu), % 0 to 0.030
52 to 66
Iron (Fe), % 0 to 0.0050
0.5 to 2.5
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0.3 to 4.0
Nickel (Ni), % 0 to 0.0020
0 to 3.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0 to 0.1
0 to 0.1
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0.35 to 1.0
20.7 to 50.2