SAE-AISI D5 Steel vs. R30155 Cobalt
Both SAE-AISI D5 steel and R30155 cobalt are iron alloys. They have 47% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI D5 steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 5.4 to 14 | |
| 34 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 81 |
| Shear Strength, MPa | 470 to 1180 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 2030 | |
| 850 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1470 |
| Melting Onset (Solidus), °C | 1390 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 450 |
| Thermal Conductivity, W/m-K | 27 | |
| 12 |
| Thermal Expansion, µm/m-K | 11 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 13 | |
| 80 |
| Density, g/cm3 | 7.7 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 3.5 | |
| 9.7 |
| Embodied Energy, MJ/kg | 51 | |
| 150 |
| Embodied Water, L/kg | 120 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 15 | |
| 37 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 28 to 73 | |
| 28 |
| Strength to Weight: Bending, points | 24 to 46 | |
| 24 |
| Thermal Diffusivity, mm2/s | 7.4 | |
| 3.2 |
| Thermal Shock Resistance, points | 26 to 67 | |
| 21 |
Alloy Composition
| Carbon (C), % | 1.4 to 1.6 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 11 to 13 | |
| 20 to 22.5 |
| Cobalt (Co), % | 2.5 to 3.5 | |
| 18.5 to 21 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 77.9 to 84.4 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0 to 0.6 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0.7 to 1.2 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 0 to 0.3 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 0.75 to 1.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |
| Vanadium (V), % | 0 to 1.0 | |
| 0 |