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AZ81A Magnesium vs. C26000 Brass

AZ81A magnesium belongs to the magnesium alloys classification, while C26000 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, 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 C26000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 3.0 to 8.8
2.5 to 66
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
41
Shear Strength, MPa 91 to 130
230 to 390
Tensile Strength: Ultimate (UTS), MPa 160 to 240
320 to 680
Tensile Strength: Yield (Proof), MPa 84
110 to 570

Thermal Properties

Latent Heat of Fusion, J/g 350
180
Maximum Temperature: Mechanical, °C 130
140
Melting Completion (Liquidus), °C 600
950
Melting Onset (Solidus), °C 500
920
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 84
120
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
28
Electrical Conductivity: Equal Weight (Specific), % IACS 65
31

Otherwise Unclassified Properties

Base Metal Price, % relative 12
25
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 23
2.7
Embodied Energy, MJ/kg 160
45
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
6.1 to 420
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
51 to 1490
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 70
19
Strength to Weight: Axial, points 26 to 39
11 to 23
Strength to Weight: Bending, points 38 to 50
13 to 21
Thermal Diffusivity, mm2/s 50
38
Thermal Shock Resistance, points 9.1 to 14
11 to 23

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Bismuth (Bi), % 0
0 to 0.0059
Copper (Cu), % 0 to 0.1
68.5 to 71.5
Iron (Fe), % 0
0 to 0.050
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
0
Zinc (Zn), % 0.4 to 1.0
28.1 to 31.5
Residuals, % 0 to 0.3
0 to 0.3