Grade 33 Titanium vs. R31539 Cobalt
Grade 33 titanium belongs to the titanium alloys classification, while R31539 cobalt belongs to the cobalt alloys. 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 33 titanium and the bottom bar is R31539 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 110 | |
220 |
Elongation at Break, % | 23 | |
13 to 22 |
Fatigue Strength, MPa | 250 | |
310 to 480 |
Poisson's Ratio | 0.32 | |
0.29 |
Reduction in Area, % | 34 | |
13 to 23 |
Shear Modulus, GPa | 41 | |
86 |
Tensile Strength: Ultimate (UTS), MPa | 390 | |
1000 to 1340 |
Tensile Strength: Yield (Proof), MPa | 350 | |
590 to 940 |
Thermal Properties
Latent Heat of Fusion, J/g | 420 | |
320 |
Melting Completion (Liquidus), °C | 1660 | |
1360 |
Melting Onset (Solidus), °C | 1610 | |
1290 |
Specific Heat Capacity, J/kg-K | 540 | |
450 |
Thermal Conductivity, W/m-K | 21 | |
13 |
Thermal Expansion, µm/m-K | 8.7 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 3.4 | |
2.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 6.9 | |
2.1 |
Otherwise Unclassified Properties
Density, g/cm3 | 4.5 | |
8.4 |
Embodied Carbon, kg CO2/kg material | 33 | |
8.2 |
Embodied Energy, MJ/kg | 530 | |
110 |
Embodied Water, L/kg | 200 | |
530 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 86 | |
140 to 190 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 | |
780 to 2000 |
Stiffness to Weight: Axial, points | 13 | |
15 |
Stiffness to Weight: Bending, points | 35 | |
24 |
Strength to Weight: Axial, points | 24 | |
33 to 44 |
Strength to Weight: Bending, points | 26 | |
27 to 32 |
Thermal Diffusivity, mm2/s | 8.7 | |
3.5 |
Thermal Shock Resistance, points | 30 | |
24 to 32 |
Alloy Composition
Aluminum (Al), % | 0 | |
0.3 to 1.0 |
Carbon (C), % | 0 to 0.080 | |
0 to 0.14 |
Chromium (Cr), % | 0.1 to 0.2 | |
26 to 30 |
Cobalt (Co), % | 0 | |
57.7 to 68.7 |
Hydrogen (H), % | 0 to 0.015 | |
0 |
Iron (Fe), % | 0 to 0.3 | |
0 to 0.75 |
Lanthanum (La), % | 0 | |
0.030 to 0.2 |
Manganese (Mn), % | 0 | |
0 to 1.0 |
Molybdenum (Mo), % | 0 | |
5.0 to 7.0 |
Nickel (Ni), % | 0.35 to 0.55 | |
0 to 1.0 |
Nitrogen (N), % | 0 to 0.030 | |
0 to 0.25 |
Oxygen (O), % | 0 to 0.25 | |
0 |
Palladium (Pd), % | 0.010 to 0.020 | |
0 |
Ruthenium (Ru), % | 0.020 to 0.040 | |
0 |
Silicon (Si), % | 0 | |
0 to 1.0 |
Titanium (Ti), % | 98.1 to 99.52 | |
0 |
Residuals, % | 0 to 0.4 | |
0 |