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AZ81A Magnesium vs. CC753S Brass

AZ81A magnesium belongs to the magnesium alloys classification, while CC753S brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 AZ81A magnesium and the bottom bar is CC753S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 55
100
Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 3.0 to 8.8
17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 160 to 240
340
Tensile Strength: Yield (Proof), MPa 84
170

Thermal Properties

Latent Heat of Fusion, J/g 350
170
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 600
820
Melting Onset (Solidus), °C 500
780
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
99
Thermal Expansion, µm/m-K 27
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
26
Electrical Conductivity: Equal Weight (Specific), % IACS 65
29

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
47
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
140
Stiffness to Weight: Axial, points 15
7.1
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
12
Strength to Weight: Bending, points 38 to 50
13
Thermal Diffusivity, mm2/s 50
32
Thermal Shock Resistance, points 9.1 to 14
11

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0.4 to 0.8
Antimony (Sb), % 0
0 to 0.050
Copper (Cu), % 0 to 0.1
56.8 to 60.5
Iron (Fe), % 0
0.5 to 0.8
Lead (Pb), % 0
1.8 to 2.5
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0 to 0.2
Nickel (Ni), % 0 to 0.010
0.5 to 1.2
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 0.3
0 to 0.050
Tin (Sn), % 0
0 to 0.8
Zinc (Zn), % 0.4 to 1.0
33.1 to 40
Residuals, % 0 to 0.3
0