AISI 403 Stainless Steel vs. R30816 Cobalt
AISI 403 stainless steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is AISI 403 stainless steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 190 to 240 | |
| 280 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 16 to 25 | |
| 23 |
| Fatigue Strength, MPa | 200 to 340 | |
| 250 |
| Poisson's Ratio | 0.28 | |
| 0.3 |
| Reduction in Area, % | 47 to 50 | |
| 22 |
| Shear Modulus, GPa | 76 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 530 to 780 | |
| 1020 |
| Tensile Strength: Yield (Proof), MPa | 280 to 570 | |
| 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Melting Completion (Liquidus), °C | 1450 | |
| 1540 |
| Melting Onset (Solidus), °C | 1400 | |
| 1460 |
| Specific Heat Capacity, J/kg-K | 480 | |
| 420 |
| Thermal Conductivity, W/m-K | 28 | |
| 13 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.8 | |
| 9.1 |
| Embodied Carbon, kg CO2/kg material | 1.9 | |
| 20 |
| Embodied Energy, MJ/kg | 27 | |
| 320 |
| Embodied Water, L/kg | 99 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 110 to 120 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 840 | |
| 510 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 22 |
| Strength to Weight: Axial, points | 19 to 28 | |
| 31 |
| Strength to Weight: Bending, points | 19 to 24 | |
| 25 |
| Thermal Diffusivity, mm2/s | 7.6 | |
| 3.3 |
| Thermal Shock Resistance, points | 20 to 29 | |
| 28 |
Alloy Composition
| Carbon (C), % | 0 to 0.15 | |
| 0.32 to 0.42 |
| Chromium (Cr), % | 11.5 to 13 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 40 to 49.8 |
| Iron (Fe), % | 84.7 to 88.5 | |
| 0 to 5.0 |
| Manganese (Mn), % | 0 to 1.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 3.5 to 4.5 |
| Nickel (Ni), % | 0 to 0.6 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 3.5 to 4.5 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 3.5 to 4.5 |
| Tungsten (W), % | 0 | |
| 3.5 to 4.5 |