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ZK40A Magnesium vs. Grade 7 Titanium

ZK40A magnesium belongs to the magnesium alloys classification, while grade 7 titanium belongs to the titanium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 ZK40A magnesium and the bottom bar is grade 7 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
110
Elongation at Break, % 4.2
24
Fatigue Strength, MPa 190
250
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
38
Shear Strength, MPa 160
270
Tensile Strength: Ultimate (UTS), MPa 280
420
Tensile Strength: Yield (Proof), MPa 260
340

Thermal Properties

Latent Heat of Fusion, J/g 340
420
Maximum Temperature: Mechanical, °C 120
320
Melting Completion (Liquidus), °C 600
1660
Melting Onset (Solidus), °C 540
1610
Specific Heat Capacity, J/kg-K 970
540
Thermal Conductivity, W/m-K 110
22
Thermal Expansion, µm/m-K 26
9.2

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 130
7.2

Otherwise Unclassified Properties

Density, g/cm3 1.8
4.5
Embodied Carbon, kg CO2/kg material 24
47
Embodied Energy, MJ/kg 160
800
Embodied Water, L/kg 950
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
95
Resilience: Unit (Modulus of Resilience), kJ/m3 740
560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 65
35
Strength to Weight: Axial, points 43
26
Strength to Weight: Bending, points 53
28
Thermal Diffusivity, mm2/s 62
8.9
Thermal Shock Resistance, points 17
31

Alloy Composition


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Carbon (C), % 0
0 to 0.080
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0
0 to 0.3
Magnesium (Mg), % 94.2 to 96.1
0
Nitrogen (N), % 0
0 to 0.030
Oxygen (O), % 0
0 to 0.25
Palladium (Pd), % 0
0.12 to 0.25
Titanium (Ti), % 0
98.7 to 99.88
Zinc (Zn), % 3.5 to 4.5
0
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.4