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Grade Ti-Pd18 Titanium vs. R30816 Cobalt

Grade Ti-Pd18 titanium belongs to the titanium alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, 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 Ti-Pd18 titanium and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 320
280
Elastic (Young's, Tensile) Modulus, GPa 110
210
Elongation at Break, % 17
23
Fatigue Strength, MPa 350
250
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 40
81
Tensile Strength: Ultimate (UTS), MPa 710
1020
Tensile Strength: Yield (Proof), MPa 540
460

Thermal Properties

Latent Heat of Fusion, J/g 410
300
Melting Completion (Liquidus), °C 1640
1540
Melting Onset (Solidus), °C 1590
1460
Specific Heat Capacity, J/kg-K 550
420
Thermal Conductivity, W/m-K 8.2
13
Thermal Expansion, µm/m-K 9.1
12

Otherwise Unclassified Properties

Density, g/cm3 4.5
9.1
Embodied Carbon, kg CO2/kg material 41
20
Embodied Energy, MJ/kg 670
320
Embodied Water, L/kg 270
440

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1380
510
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 35
22
Strength to Weight: Axial, points 44
31
Strength to Weight: Bending, points 39
25
Thermal Diffusivity, mm2/s 3.3
3.3
Thermal Shock Resistance, points 52
28

Alloy Composition

Aluminum (Al), % 2.5 to 3.5
0
Carbon (C), % 0 to 0.1
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Hydrogen (H), % 0 to 0.015
0
Iron (Fe), % 0 to 0.25
0 to 5.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0 to 0.050
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Oxygen (O), % 0 to 0.15
0
Palladium (Pd), % 0.040 to 0.080
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Titanium (Ti), % 92.5 to 95.5
0
Tungsten (W), % 0
3.5 to 4.5
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0