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AZ91A Magnesium vs. Grade 19 Titanium

AZ91A magnesium belongs to the magnesium alloys classification, while grade 19 titanium belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 grade 19 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
120
Elongation at Break, % 5.0
5.6 to 17
Fatigue Strength, MPa 99
550 to 620
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
47
Shear Strength, MPa 140
550 to 750
Tensile Strength: Ultimate (UTS), MPa 240
890 to 1300
Tensile Strength: Yield (Proof), MPa 160
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 360
400
Maximum Temperature: Mechanical, °C 130
370
Melting Completion (Liquidus), °C 600
1660
Melting Onset (Solidus), °C 470
1600
Specific Heat Capacity, J/kg-K 990
520
Thermal Conductivity, W/m-K 73
6.2
Thermal Expansion, µm/m-K 26
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 12
45
Density, g/cm3 1.7
5.0
Embodied Carbon, kg CO2/kg material 22
47
Embodied Energy, MJ/kg 160
760
Embodied Water, L/kg 990
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
70 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 280
3040 to 5530
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
33
Strength to Weight: Axial, points 38
49 to 72
Strength to Weight: Bending, points 49
41 to 53
Thermal Diffusivity, mm2/s 42
2.4
Thermal Shock Resistance, points 14
57 to 83

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
3.0 to 4.0
Carbon (C), % 0
0 to 0.050
Chromium (Cr), % 0
5.5 to 6.5
Copper (Cu), % 0 to 0.1
0
Hydrogen (H), % 0
0 to 0.020
Iron (Fe), % 0
0 to 0.3
Magnesium (Mg), % 88.2 to 91.2
0
Manganese (Mn), % 0.13 to 0.5
0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0 to 0.030
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.12
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0
71.1 to 77
Vanadium (V), % 0
7.5 to 8.5
Zinc (Zn), % 0.35 to 1.0
0
Zirconium (Zr), % 0
3.5 to 4.5
Residuals, % 0
0 to 0.4