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Grade Ti-Pd18 Titanium vs. R30021 Cobalt

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is grade Ti-Pd18 titanium and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
220
Elongation at Break, % 17
9.0
Fatigue Strength, MPa 350
250
Poisson's Ratio 0.32
0.29
Rockwell C Hardness 34
32
Shear Modulus, GPa 40
86
Tensile Strength: Ultimate (UTS), MPa 710
700
Tensile Strength: Yield (Proof), MPa 540
500

Thermal Properties

Latent Heat of Fusion, J/g 410
330
Melting Completion (Liquidus), °C 1640
1350
Melting Onset (Solidus), °C 1590
1190
Specific Heat Capacity, J/kg-K 550
450
Thermal Conductivity, W/m-K 8.2
15
Thermal Expansion, µm/m-K 9.1
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.1

Otherwise Unclassified Properties

Density, g/cm3 4.5
8.4
Embodied Carbon, kg CO2/kg material 41
8.0
Embodied Energy, MJ/kg 670
110
Embodied Water, L/kg 270
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
57
Resilience: Unit (Modulus of Resilience), kJ/m3 1380
570
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 35
24
Strength to Weight: Axial, points 44
23
Strength to Weight: Bending, points 39
21
Thermal Diffusivity, mm2/s 3.3
3.8
Thermal Shock Resistance, points 52
21

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.1
0.2 to 0.35
Chromium (Cr), % 0
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
0 to 3.0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 0 to 0.050
2.0 to 3.0
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Silicon (Si), % 0
0 to 1.5
Titanium (Ti), % 92.5 to 95.5
0
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0