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AZ91A Magnesium vs. Class 2 Tungsten

AZ91A magnesium belongs to the magnesium alloys classification, while class 2 tungsten belongs to the otherwise unclassified metals. There are 24 material properties with values for both materials. Properties with values for just one material (10, 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 class 2 tungsten.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
260
Elongation at Break, % 5.0
5.7
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 18
100
Tensile Strength: Ultimate (UTS), MPa 240
860
Tensile Strength: Yield (Proof), MPa 160
580

Thermal Properties

Latent Heat of Fusion, J/g 360
160
Specific Heat Capacity, J/kg-K 990
120
Thermal Conductivity, W/m-K 73
20
Thermal Expansion, µm/m-K 26
4.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
13
Electrical Conductivity: Equal Weight (Specific), % IACS 52
7.8

Otherwise Unclassified Properties

Density, g/cm3 1.7
15
Embodied Carbon, kg CO2/kg material 22
23
Embodied Energy, MJ/kg 160
350
Embodied Water, L/kg 990
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
44
Resilience: Unit (Modulus of Resilience), kJ/m3 280
640
Stiffness to Weight: Axial, points 15
9.6
Stiffness to Weight: Bending, points 69
14
Strength to Weight: Axial, points 38
16
Strength to Weight: Bending, points 49
13
Thermal Diffusivity, mm2/s 42
11
Thermal Shock Resistance, points 14
52

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
0
Copper (Cu), % 0 to 0.1
0
Magnesium (Mg), % 88.2 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
Tungsten (W), % 0
92.5
Zinc (Zn), % 0.35 to 1.0
0
Residuals, % 0
7.5