ASTM B817 Type I vs. R30075 Cobalt
ASTM B817 type I belongs to the titanium alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type I and the bottom bar is R30075 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 100 | |
| 210 to 250 |
| Elongation at Break, % | 4.0 to 13 | |
| 12 |
| Fatigue Strength, MPa | 360 to 520 | |
| 250 to 840 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Reduction in Area, % | 5.0 to 29 | |
| 20 |
| Shear Modulus, GPa | 40 | |
| 82 to 98 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 960 | |
| 780 to 1280 |
| Tensile Strength: Yield (Proof), MPa | 700 to 860 | |
| 480 to 840 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 320 |
| Melting Completion (Liquidus), °C | 1600 | |
| 1360 |
| Melting Onset (Solidus), °C | 1550 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 560 | |
| 450 |
| Thermal Conductivity, W/m-K | 7.1 | |
| 13 |
| Thermal Expansion, µm/m-K | 9.6 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.0 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.0 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.4 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 38 | |
| 8.1 |
| Embodied Energy, MJ/kg | 610 | |
| 110 |
| Embodied Water, L/kg | 200 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 30 to 120 | |
| 84 to 140 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2310 to 3540 | |
| 560 to 1410 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 to 17 |
| Stiffness to Weight: Bending, points | 35 | |
| 24 to 25 |
| Strength to Weight: Axial, points | 48 to 60 | |
| 26 to 42 |
| Strength to Weight: Bending, points | 42 to 49 | |
| 22 to 31 |
| Thermal Diffusivity, mm2/s | 2.9 | |
| 3.5 |
| Thermal Shock Resistance, points | 54 to 68 | |
| 21 to 29 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 452
| Aluminum (Al), % | 5.5 to 6.8 | |
| 0 to 0.1 |
| Boron (B), % | 0 | |
| 0 to 0.010 |
| Carbon (C), % | 0 to 0.1 | |
| 0 to 0.35 |
| Chlorine (Cl), % | 0 to 0.2 | |
| 0 |
| Chromium (Cr), % | 0 | |
| 27 to 30 |
| Cobalt (Co), % | 0 | |
| 58.7 to 68 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.75 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 0 | |
| 0 to 0.5 |
| Nitrogen (N), % | 0 to 0.040 | |
| 0 to 0.25 |
| Oxygen (O), % | 0 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 1.0 |
| Sodium (Na), % | 0 to 0.2 | |
| 0 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 87 to 91 | |
| 0 to 0.1 |
| Tungsten (W), % | 0 | |
| 0 to 0.2 |
| Vanadium (V), % | 3.5 to 4.5 | |
| 0 |
| Residuals, % | 0 to 0.4 | |
| 0 |