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Grade 7 Titanium vs. ZK51A Magnesium

Grade 7 titanium belongs to the titanium alloys classification, while ZK51A magnesium belongs to the magnesium 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 grade 7 titanium and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
45
Elongation at Break, % 24
4.7
Fatigue Strength, MPa 250
62
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 38
18
Shear Strength, MPa 270
160
Tensile Strength: Ultimate (UTS), MPa 420
240
Tensile Strength: Yield (Proof), MPa 340
150

Thermal Properties

Latent Heat of Fusion, J/g 420
340
Maximum Temperature: Mechanical, °C 320
120
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
550
Specific Heat Capacity, J/kg-K 540
970
Thermal Conductivity, W/m-K 22
110
Thermal Expansion, µm/m-K 9.2
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.6
28
Electrical Conductivity: Equal Weight (Specific), % IACS 7.2
140

Otherwise Unclassified Properties

Density, g/cm3 4.5
1.8
Embodied Carbon, kg CO2/kg material 47
24
Embodied Energy, MJ/kg 800
160
Embodied Water, L/kg 470
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
10
Resilience: Unit (Modulus of Resilience), kJ/m3 560
260
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
64
Strength to Weight: Axial, points 26
36
Strength to Weight: Bending, points 28
47
Thermal Diffusivity, mm2/s 8.9
61
Thermal Shock Resistance, points 31
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 0.3
0
Magnesium (Mg), % 0
93.1 to 95.9
Nickel (Ni), % 0
0 to 0.010
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.25
0
Palladium (Pd), % 0.12 to 0.25
0
Titanium (Ti), % 98.7 to 99.88
0
Zinc (Zn), % 0
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3