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Grade 15 Titanium vs. ZK61A Magnesium

Grade 15 titanium belongs to the titanium alloys classification, while ZK61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 15 titanium and the bottom bar is ZK61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
46
Elongation at Break, % 20
5.8 to 7.1
Fatigue Strength, MPa 290
120 to 140
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 41
18
Shear Strength, MPa 340
170 to 180
Tensile Strength: Ultimate (UTS), MPa 540
290 to 310
Tensile Strength: Yield (Proof), MPa 430
180 to 200

Thermal Properties

Latent Heat of Fusion, J/g 420
330
Maximum Temperature: Mechanical, °C 320
120
Melting Completion (Liquidus), °C 1660
640
Melting Onset (Solidus), °C 1610
530
Specific Heat Capacity, J/kg-K 540
960
Thermal Conductivity, W/m-K 21
120
Thermal Expansion, µm/m-K 8.7
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.4
29
Electrical Conductivity: Equal Weight (Specific), % IACS 6.7
130

Otherwise Unclassified Properties

Base Metal Price, % relative 37
13
Density, g/cm3 4.5
1.9
Embodied Carbon, kg CO2/kg material 32
23
Embodied Energy, MJ/kg 520
160
Embodied Water, L/kg 210
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
15 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 870
370 to 420
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
62
Strength to Weight: Axial, points 33
42 to 45
Strength to Weight: Bending, points 33
50 to 53
Thermal Diffusivity, mm2/s 8.4
65
Thermal Shock Resistance, points 41
17 to 18

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
92.1 to 93.9
Nickel (Ni), % 0.4 to 0.6
0 to 0.010
Nitrogen (N), % 0 to 0.050
0
Oxygen (O), % 0 to 0.25
0
Ruthenium (Ru), % 0.040 to 0.060
0
Titanium (Ti), % 98.2 to 99.56
0
Zinc (Zn), % 0
5.5 to 6.5
Zirconium (Zr), % 0
0.6 to 1.0
Residuals, % 0
0 to 0.3