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Grade 4 Titanium vs. QE22A Magnesium

Grade 4 titanium belongs to the titanium alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (7, 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 4 titanium and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
80
Elastic (Young's, Tensile) Modulus, GPa 110
44
Elongation at Break, % 17
2.4
Fatigue Strength, MPa 340
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
17
Shear Strength, MPa 390
150
Tensile Strength: Ultimate (UTS), MPa 640
250
Tensile Strength: Yield (Proof), MPa 530
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 19
110
Thermal Expansion, µm/m-K 9.4
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
25
Electrical Conductivity: Equal Weight (Specific), % IACS 6.3
120

Otherwise Unclassified Properties

Density, g/cm3 4.5
2.0
Embodied Carbon, kg CO2/kg material 31
27
Embodied Energy, MJ/kg 500
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 1330
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
60
Strength to Weight: Axial, points 40
36
Strength to Weight: Bending, points 37
46
Thermal Diffusivity, mm2/s 7.6
59
Thermal Shock Resistance, points 46
15

Alloy Composition

Carbon (C), % 0 to 0.080
0
Copper (Cu), % 0
0 to 0.1
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.5
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 0.4
0
Silver (Ag), % 0
2.0 to 3.0
Titanium (Ti), % 98.6 to 100
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3