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AZ81A Magnesium vs. Grade 6 Titanium

AZ81A magnesium belongs to the magnesium alloys classification, while grade 6 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 6 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
100
Elongation at Break, % 3.0 to 8.8
11
Fatigue Strength, MPa 78 to 80
290
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
39
Shear Strength, MPa 91 to 130
530
Tensile Strength: Ultimate (UTS), MPa 160 to 240
890
Tensile Strength: Yield (Proof), MPa 84
840

Thermal Properties

Latent Heat of Fusion, J/g 350
410
Maximum Temperature: Mechanical, °C 130
310
Melting Completion (Liquidus), °C 600
1580
Melting Onset (Solidus), °C 500
1530
Specific Heat Capacity, J/kg-K 990
550
Thermal Conductivity, W/m-K 84
7.8
Thermal Expansion, µm/m-K 27
9.4

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
1.2
Electrical Conductivity: Equal Weight (Specific), % IACS 65
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.7
4.5
Embodied Carbon, kg CO2/kg material 23
30
Embodied Energy, MJ/kg 160
480
Embodied Water, L/kg 990
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
92
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
3390
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 70
35
Strength to Weight: Axial, points 26 to 39
55
Strength to Weight: Bending, points 38 to 50
46
Thermal Diffusivity, mm2/s 50
3.2
Thermal Shock Resistance, points 9.1 to 14
65

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
4.0 to 6.0
Carbon (C), % 0
0 to 0.080
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 89.8 to 92.5
0
Manganese (Mn), % 0.13 to 0.35
0
Nickel (Ni), % 0 to 0.010
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.2
Silicon (Si), % 0 to 0.3
0
Tin (Sn), % 0
2.0 to 3.0
Titanium (Ti), % 0
89.8 to 94
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.4