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AZ81A Magnesium vs. Grade 33 Titanium

AZ81A magnesium belongs to the magnesium alloys classification, while grade 33 titanium belongs to the titanium alloys. There are 30 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 AZ81A magnesium and the bottom bar is grade 33 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 3.0 to 8.8
23
Fatigue Strength, MPa 78 to 80
250
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
41
Shear Strength, MPa 91 to 130
240
Tensile Strength: Ultimate (UTS), MPa 160 to 240
390
Tensile Strength: Yield (Proof), MPa 84
350

Thermal Properties

Latent Heat of Fusion, J/g 350
420
Maximum Temperature: Mechanical, °C 130
320
Melting Completion (Liquidus), °C 600
1660
Melting Onset (Solidus), °C 500
1610
Specific Heat Capacity, J/kg-K 990
540
Thermal Conductivity, W/m-K 84
21
Thermal Expansion, µm/m-K 27
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
3.4
Electrical Conductivity: Equal Weight (Specific), % IACS 65
6.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
55
Density, g/cm3 1.7
4.5
Embodied Carbon, kg CO2/kg material 23
33
Embodied Energy, MJ/kg 160
530
Embodied Water, L/kg 990
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
86
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
590
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 70
35
Strength to Weight: Axial, points 26 to 39
24
Strength to Weight: Bending, points 38 to 50
26
Thermal Diffusivity, mm2/s 50
8.7
Thermal Shock Resistance, points 9.1 to 14
30

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
0
Carbon (C), % 0
0 to 0.080
Chromium (Cr), % 0
0.1 to 0.2
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.3
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0.35 to 0.55
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.010 to 0.020
Ruthenium (Ru), % 0
0.020 to 0.040
Silicon (Si), % 0 to 0.3
0
Titanium (Ti), % 0
98.1 to 99.52
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.4