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R30021 Cobalt vs. Grade Ti-Pd16 Titanium

R30021 cobalt belongs to the cobalt alloys classification, while grade Ti-Pd16 titanium belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is grade Ti-Pd16 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
110
Elongation at Break, % 9.0
17
Fatigue Strength, MPa 250
200
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 86
40
Tensile Strength: Ultimate (UTS), MPa 700
390
Tensile Strength: Yield (Proof), MPa 500
310

Thermal Properties

Latent Heat of Fusion, J/g 330
420
Melting Completion (Liquidus), °C 1350
1660
Melting Onset (Solidus), °C 1190
1610
Specific Heat Capacity, J/kg-K 450
540
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 11
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
7.1

Otherwise Unclassified Properties

Density, g/cm3 8.4
4.5
Embodied Carbon, kg CO2/kg material 8.0
36
Embodied Energy, MJ/kg 110
600
Embodied Water, L/kg 520
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
62
Resilience: Unit (Modulus of Resilience), kJ/m3 570
440
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
35
Strength to Weight: Axial, points 23
24
Strength to Weight: Bending, points 21
26
Thermal Diffusivity, mm2/s 3.8
8.9
Thermal Shock Resistance, points 21
30

Alloy Composition


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Carbon (C), % 0.2 to 0.35
0 to 0.1
Chromium (Cr), % 26 to 29
0
Cobalt (Co), % 61.7 to 67.3
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 0 to 3.0
0 to 0.3
Molybdenum (Mo), % 4.5 to 6.0
0
Nickel (Ni), % 2.0 to 3.0
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Palladium (Pd), % 0
0.040 to 0.080
Silicon (Si), % 0 to 1.5
0
Titanium (Ti), % 0
98.8 to 99.96
Residuals, % 0
0 to 0.4