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AZ91B Magnesium vs. C34200 Brass

AZ91B magnesium belongs to the magnesium alloys classification, while C34200 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 AZ91B magnesium and the bottom bar is C34200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 5.0
3.0 to 17
Poisson's Ratio 0.29
0.31
Shear Modulus, GPa 18
40
Shear Strength, MPa 140
230 to 360
Tensile Strength: Ultimate (UTS), MPa 240
370 to 650
Tensile Strength: Yield (Proof), MPa 160
150 to 420

Thermal Properties

Latent Heat of Fusion, J/g 360
170
Maximum Temperature: Mechanical, °C 130
120
Melting Completion (Liquidus), °C 600
910
Melting Onset (Solidus), °C 470
890
Specific Heat Capacity, J/kg-K 990
380
Thermal Conductivity, W/m-K 73
120
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
26
Electrical Conductivity: Equal Weight (Specific), % IACS 58
29

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
45
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
9.0 to 98
Resilience: Unit (Modulus of Resilience), kJ/m3 280
110 to 870
Stiffness to Weight: Axial, points 15
7.1
Stiffness to Weight: Bending, points 69
19
Strength to Weight: Axial, points 38
13 to 22
Strength to Weight: Bending, points 49
14 to 20
Thermal Diffusivity, mm2/s 42
37
Thermal Shock Resistance, points 14
12 to 22

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
62 to 65
Iron (Fe), % 0
0 to 0.1
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
32 to 36.5
Residuals, % 0
0 to 0.4