SAE-AISI D3 Steel vs. R30155 Cobalt
Both SAE-AISI D3 steel and R30155 cobalt are iron alloys. They have 44% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI D3 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, % | 9.8 to 15 | |
| 34 |
| Fatigue Strength, MPa | 310 to 940 | |
| 310 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 81 |
| Shear Strength, MPa | 470 to 1220 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 770 to 2050 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 480 to 1550 | |
| 390 |
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 | 31 | |
| 12 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 8.0 | |
| 80 |
| Density, g/cm3 | 7.7 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 3.2 | |
| 9.7 |
| Embodied Energy, MJ/kg | 48 | |
| 150 |
| Embodied Water, L/kg | 100 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 13 | |
| 37 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 97 to 180 | |
| 230 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 |
| Strength to Weight: Axial, points | 28 to 74 | |
| 28 |
| Strength to Weight: Bending, points | 24 to 47 | |
| 24 |
| Thermal Diffusivity, mm2/s | 8.3 | |
| 3.2 |
| Thermal Shock Resistance, points | 23 to 63 | |
| 21 |
Alloy Composition
| Carbon (C), % | 2.0 to 2.4 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 11 to 13.5 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 80.3 to 87 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0 to 0.6 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 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 to 1.0 | |
| 2.0 to 3.0 |
| Vanadium (V), % | 0 to 1.0 | |
| 0 |