SAE-AISI 9310 Steel vs. R30816 Cobalt
SAE-AISI 9310 steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 26 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 9310 steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 540 to 610 | |
| 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 17 to 19 | |
| 23 |
| Fatigue Strength, MPa | 300 to 390 | |
| 250 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 73 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 820 to 910 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 450 to 570 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 300 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1540 |
| Melting Onset (Solidus), °C | 1420 | |
| 1460 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 420 |
| Thermal Conductivity, W/m-K | 48 | |
| 13 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.9 | |
| 9.1 |
| Embodied Carbon, kg CO2/kg material | 1.8 | |
| 20 |
| Embodied Energy, MJ/kg | 24 | |
| 320 |
| Embodied Water, L/kg | 57 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 to 150 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 540 to 860 | |
| 510 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 22 |
| Strength to Weight: Axial, points | 29 to 32 | |
| 31 |
| Strength to Weight: Bending, points | 25 to 27 | |
| 25 |
| Thermal Diffusivity, mm2/s | 13 | |
| 3.3 |
| Thermal Shock Resistance, points | 24 to 27 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.13 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 1.0 to 1.4 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Iron (Fe), % | 93.8 to 95.2 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0.45 to 0.65 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0.080 to 0.15 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 3.0 to 3.5 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.2 to 0.35 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.012 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 3.5 to 4.5 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |