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AZ81A Magnesium vs. AWS ERTi-5

AZ81A magnesium belongs to the magnesium alloys classification, while AWS ERTi-5 belongs to the titanium alloys. There are 29 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 AWS ERTi-5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
110
Elongation at Break, % 3.0 to 8.8
10
Fatigue Strength, MPa 78 to 80
470
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
40
Tensile Strength: Ultimate (UTS), MPa 160 to 240
900
Tensile Strength: Yield (Proof), MPa 84
830

Thermal Properties

Latent Heat of Fusion, J/g 350
410
Maximum Temperature: Mechanical, °C 130
340
Melting Completion (Liquidus), °C 600
1610
Melting Onset (Solidus), °C 500
1560
Specific Heat Capacity, J/kg-K 990
560
Thermal Conductivity, W/m-K 84
7.1
Thermal Expansion, µm/m-K 27
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 65
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
36
Density, g/cm3 1.7
4.4
Embodied Carbon, kg CO2/kg material 23
38
Embodied Energy, MJ/kg 160
610
Embodied Water, L/kg 990
200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
87
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
3250
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 70
35
Strength to Weight: Axial, points 26 to 39
56
Strength to Weight: Bending, points 38 to 50
46
Thermal Diffusivity, mm2/s 50
2.9
Thermal Shock Resistance, points 9.1 to 14
63

Alloy Composition


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Aluminum (Al), % 7.0 to 8.1
5.5 to 6.8
Carbon (C), % 0
0 to 0.050
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.22
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
0.12 to 0.2
Silicon (Si), % 0 to 0.3
0
Titanium (Ti), % 0
88.2 to 90.9
Vanadium (V), % 0
3.5 to 4.5
Zinc (Zn), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0