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Grade 31 Titanium vs. QE22A Magnesium

Grade 31 titanium belongs to the titanium alloys classification, while QE22A magnesium belongs to the magnesium 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 grade 31 titanium and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
44
Elongation at Break, % 20
2.4
Fatigue Strength, MPa 300
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
17
Shear Strength, MPa 320
150
Tensile Strength: Ultimate (UTS), MPa 510
250
Tensile Strength: Yield (Proof), MPa 450
190

Thermal Properties

Latent Heat of Fusion, J/g 420
340
Maximum Temperature: Mechanical, °C 320
250
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
570
Specific Heat Capacity, J/kg-K 540
970
Thermal Conductivity, W/m-K 21
110
Thermal Expansion, µm/m-K 8.7
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
25
Electrical Conductivity: Equal Weight (Specific), % IACS 6.9
120

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.0
Embodied Carbon, kg CO2/kg material 36
27
Embodied Energy, MJ/kg 600
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 940
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
60
Strength to Weight: Axial, points 32
36
Strength to Weight: Bending, points 32
46
Thermal Diffusivity, mm2/s 8.5
59
Thermal Shock Resistance, points 39
15

Alloy Composition

Carbon (C), % 0 to 0.080
0
Cobalt (Co), % 0.2 to 0.8
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 0
93.1 to 95.8
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.35
0
Palladium (Pd), % 0.040 to 0.080
0
Silver (Ag), % 0
2.0 to 3.0
Titanium (Ti), % 97.9 to 99.76
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3