R31538 Cobalt vs. Titanium 4-4-2
R31538 cobalt belongs to the cobalt alloys classification, while titanium 4-4-2 belongs to the titanium alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is titanium 4-4-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 110 |
| Elongation at Break, % | 13 to 23 | |
| 10 |
| Fatigue Strength, MPa | 310 to 480 | |
| 590 to 620 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Reduction in Area, % | 13 to 22 | |
| 20 |
| Shear Modulus, GPa | 86 | |
| 42 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
| 1150 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 580 to 930 | |
| 1030 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 410 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1610 |
| Melting Onset (Solidus), °C | 1290 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 540 |
| Thermal Conductivity, W/m-K | 13 | |
| 6.7 |
| Thermal Expansion, µm/m-K | 13 | |
| 8.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 4.7 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 30 |
| Embodied Energy, MJ/kg | 110 | |
| 480 |
| Embodied Water, L/kg | 530 | |
| 180 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 200 | |
| 110 to 120 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 750 to 1920 | |
| 4700 to 5160 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 34 |
| Strength to Weight: Axial, points | 34 to 45 | |
| 68 to 74 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 52 to 55 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 2.6 |
| Thermal Shock Resistance, points | 25 to 33 | |
| 86 to 93 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 3.0 to 5.0 |
| Carbon (C), % | 0.15 to 0.35 | |
| 0 to 0.080 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 58.7 to 68.9 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.75 | |
| 0 to 0.2 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 3.0 to 5.0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 to 0.050 |
| Oxygen (O), % | 0 | |
| 0 to 0.25 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.3 to 0.7 |
| Tin (Sn), % | 0 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 0 | |
| 85.8 to 92.2 |
| Residuals, % | 0 | |
| 0 to 0.4 |