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Grade 18 Titanium vs. Grade Ti-Pd7B Titanium

Both grade 18 titanium and grade Ti-Pd7B titanium are titanium alloys. They have a moderately high 94% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is grade 18 titanium and the bottom bar is grade Ti-Pd7B titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
110
Elongation at Break, % 11 to 17
17
Fatigue Strength, MPa 330 to 480
200
Poisson's Ratio 0.32
0.32
Shear Modulus, GPa 40
40
Tensile Strength: Ultimate (UTS), MPa 690 to 980
390
Tensile Strength: Yield (Proof), MPa 540 to 810
310

Thermal Properties

Latent Heat of Fusion, J/g 410
420
Maximum Temperature: Mechanical, °C 330
320
Melting Completion (Liquidus), °C 1640
1660
Melting Onset (Solidus), °C 1590
1610
Specific Heat Capacity, J/kg-K 550
540
Thermal Conductivity, W/m-K 8.3
22
Thermal Expansion, µm/m-K 9.9
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.3
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
7.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
4.5
Embodied Carbon, kg CO2/kg material 41
49
Embodied Energy, MJ/kg 670
840
Embodied Water, L/kg 270
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 110
62
Resilience: Unit (Modulus of Resilience), kJ/m3 1380 to 3110
440
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
35
Strength to Weight: Axial, points 43 to 61
24
Strength to Weight: Bending, points 39 to 49
26
Thermal Diffusivity, mm2/s 3.4
8.9
Thermal Shock Resistance, points 47 to 67
30

Alloy Composition


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Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.080
0 to 0.1
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 0 to 0.25
0 to 0.2
Nickel (Ni), % 0
0 to 0.050
Nitrogen (N), % 0 to 0.030
0
Oxygen (O), % 0 to 0.15
0 to 0.4
Palladium (Pd), % 0.040 to 0.080
0.12 to 0.3
Titanium (Ti), % 92.5 to 95.5
98.8 to 99.9
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0 to 0.4