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AZ91A Magnesium vs. C32000 Brass

AZ91A magnesium belongs to the magnesium alloys classification, while C32000 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 AZ91A magnesium and the bottom bar is C32000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 5.0
6.8 to 29
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
41
Shear Strength, MPa 140
180 to 280
Tensile Strength: Ultimate (UTS), MPa 240
270 to 470
Tensile Strength: Yield (Proof), MPa 160
78 to 390

Thermal Properties

Latent Heat of Fusion, J/g 360
190
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
1020
Melting Onset (Solidus), °C 470
990
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
160
Thermal Expansion, µm/m-K 26
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
36
Electrical Conductivity: Equal Weight (Specific), % IACS 52
37

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 1.7
8.7
Embodied Carbon, kg CO2/kg material 22
2.6
Embodied Energy, MJ/kg 160
42
Embodied Water, L/kg 990
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
30 to 59
Resilience: Unit (Modulus of Resilience), kJ/m3 280
28 to 680
Stiffness to Weight: Axial, points 15
7.1
Stiffness to Weight: Bending, points 69
18
Strength to Weight: Axial, points 38
8.8 to 15
Strength to Weight: Bending, points 49
11 to 16
Thermal Diffusivity, mm2/s 42
47
Thermal Shock Resistance, points 14
9.5 to 16

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
83.5 to 86.5
Iron (Fe), % 0
0 to 0.1
Lead (Pb), % 0
1.5 to 2.2
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0 to 0.25
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
10.6 to 15
Residuals, % 0
0 to 0.4