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AZ91B Magnesium vs. C28500 Muntz Metal

AZ91B magnesium belongs to the magnesium alloys classification, while C28500 Muntz Metal 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 C28500 Muntz Metal.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 5.0
20
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 18
40
Shear Strength, MPa 140
320
Tensile Strength: Ultimate (UTS), MPa 240
520
Tensile Strength: Yield (Proof), MPa 160
380

Thermal Properties

Latent Heat of Fusion, J/g 360
170
Maximum Temperature: Mechanical, °C 130
110
Melting Completion (Liquidus), °C 600
900
Melting Onset (Solidus), °C 470
890
Specific Heat Capacity, J/kg-K 990
390
Thermal Conductivity, W/m-K 73
100
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
29
Electrical Conductivity: Equal Weight (Specific), % IACS 58
33

Otherwise Unclassified Properties

Base Metal Price, % relative 12
22
Density, g/cm3 1.7
7.9
Embodied Carbon, kg CO2/kg material 22
2.7
Embodied Energy, MJ/kg 160
46
Embodied Water, L/kg 990
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
94
Resilience: Unit (Modulus of Resilience), kJ/m3 280
700
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 69
20
Strength to Weight: Axial, points 38
18
Strength to Weight: Bending, points 49
18
Thermal Diffusivity, mm2/s 42
33
Thermal Shock Resistance, points 14
17

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.35
57 to 59
Iron (Fe), % 0
0 to 0.35
Lead (Pb), % 0
0 to 0.25
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
39.5 to 43
Residuals, % 0
0 to 0.9