SAE-AISI D4 Steel vs. R30035 Cobalt
SAE-AISI D4 steel belongs to the iron alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 27 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 SAE-AISI D4 steel and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 to 230 |
| Elongation at Break, % | 8.4 to 15 | |
| 9.0 to 46 |
| Fatigue Strength, MPa | 310 to 920 | |
| 170 to 740 |
| Poisson's Ratio | 0.28 | |
| 0.29 |
| Shear Modulus, GPa | 74 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 760 to 2060 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1540 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 320 |
| Melting Completion (Liquidus), °C | 1430 | |
| 1440 |
| Melting Onset (Solidus), °C | 1380 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 440 |
| Thermal Conductivity, W/m-K | 31 | |
| 11 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 4.2 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 5.0 | |
| 1.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 8.0 | |
| 100 |
| Density, g/cm3 | 7.7 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 3.3 | |
| 10 |
| Embodied Energy, MJ/kg | 49 | |
| 140 |
| Embodied Water, L/kg | 100 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 160 | |
| 160 to 320 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 25 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 27 to 75 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 24 to 47 | |
| 24 to 39 |
| Thermal Diffusivity, mm2/s | 8.3 | |
| 3.0 |
| Thermal Shock Resistance, points | 23 to 63 | |
| 23 to 46 |
Alloy Composition
| Boron (B), % | 0 | |
| 0 to 0.015 |
| Carbon (C), % | 2.1 to 2.4 | |
| 0 to 0.025 |
| Chromium (Cr), % | 11 to 13 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 80.6 to 86.3 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0 to 0.6 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0.7 to 1.2 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 0 to 0.3 | |
| 33 to 37 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.6 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |
| Vanadium (V), % | 0 to 1.0 | |
| 0 |