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AZ91B Magnesium vs. C33200 Brass

AZ91B magnesium belongs to the magnesium alloys classification, while C33200 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 AZ91B magnesium and the bottom bar is C33200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 5.0
7.0 to 60
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Shear Strength, MPa 140
240 to 300
Tensile Strength: Ultimate (UTS), MPa 240
320 to 520
Tensile Strength: Yield (Proof), MPa 160
110 to 450

Thermal Properties

Latent Heat of Fusion, J/g 360
170
Maximum Temperature: Mechanical, °C 130
130
Melting Completion (Liquidus), °C 600
930
Melting Onset (Solidus), °C 470
900
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
120
Thermal Expansion, µm/m-K 26
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
26
Electrical Conductivity: Equal Weight (Specific), % IACS 58
28

Otherwise Unclassified Properties

Base Metal Price, % relative 12
24
Density, g/cm3 1.7
8.2
Embodied Carbon, kg CO2/kg material 22
2.6
Embodied Energy, MJ/kg 160
44
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
35 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
60 to 960
Stiffness to Weight: Axial, points 15
7.1
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
11 to 17
Strength to Weight: Bending, points 49
13 to 17
Thermal Diffusivity, mm2/s 42
37
Thermal Shock Resistance, points 14
11 to 17

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
65 to 68
Iron (Fe), % 0
0 to 0.070
Lead (Pb), % 0
1.5 to 2.5
Magnesium (Mg), % 87.9 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0
Zinc (Zn), % 0.35 to 1.0
29 to 33.5
Residuals, % 0
0 to 0.4