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AZ91D Magnesium vs. CC754S Brass

AZ91D magnesium belongs to the magnesium alloys classification, while CC754S 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 CC754S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
90
Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 2.3 to 4.5
11
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 160 to 220
320
Tensile Strength: Yield (Proof), MPa 80 to 130
160

Thermal Properties

Latent Heat of Fusion, J/g 350
170
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 600
830
Melting Onset (Solidus), °C 490
780
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 78
95
Thermal Expansion, µm/m-K 27
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
27
Electrical Conductivity: Equal Weight (Specific), % IACS 58
30

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 1.7
8.1
Embodied Carbon, kg CO2/kg material 22
2.8
Embodied Energy, MJ/kg 160
47
Embodied Water, L/kg 990
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
29
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
130
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 26 to 34
11
Strength to Weight: Bending, points 38 to 46
13
Thermal Diffusivity, mm2/s 45
31
Thermal Shock Resistance, points 9.5 to 13
10

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
0 to 0.8
Copper (Cu), % 0 to 0.030
57 to 63
Iron (Fe), % 0 to 0.0050
0 to 0.7
Lead (Pb), % 0
0.5 to 2.5
Magnesium (Mg), % 88.7 to 91.2
0
Manganese (Mn), % 0.15 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 0.0020
0 to 1.0
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.1
0 to 0.3
Tin (Sn), % 0
0 to 1.0
Zinc (Zn), % 0.35 to 1.0
30.2 to 42.5