R30816 Cobalt vs. AISI 416 Stainless Steel
R30816 cobalt belongs to the cobalt alloys classification, while AISI 416 stainless steel belongs to the iron alloys. There are 26 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 R30816 cobalt and the bottom bar is AISI 416 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 280 | |
230 to 320 |
Elastic (Young's, Tensile) Modulus, GPa | 210 | |
190 |
Elongation at Break, % | 23 | |
13 to 31 |
Fatigue Strength, MPa | 250 | |
230 to 340 |
Poisson's Ratio | 0.3 | |
0.28 |
Shear Modulus, GPa | 81 | |
76 |
Tensile Strength: Ultimate (UTS), MPa | 1020 | |
510 to 800 |
Tensile Strength: Yield (Proof), MPa | 460 | |
290 to 600 |
Thermal Properties
Latent Heat of Fusion, J/g | 300 | |
270 |
Melting Completion (Liquidus), °C | 1540 | |
1530 |
Melting Onset (Solidus), °C | 1460 | |
1480 |
Specific Heat Capacity, J/kg-K | 420 | |
480 |
Thermal Conductivity, W/m-K | 13 | |
30 |
Thermal Expansion, µm/m-K | 12 | |
9.9 |
Otherwise Unclassified Properties
Density, g/cm3 | 9.1 | |
7.7 |
Embodied Carbon, kg CO2/kg material | 20 | |
1.9 |
Embodied Energy, MJ/kg | 320 | |
27 |
Embodied Water, L/kg | 440 | |
100 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
98 to 140 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
220 to 940 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 22 | |
25 |
Strength to Weight: Axial, points | 31 | |
18 to 29 |
Strength to Weight: Bending, points | 25 | |
18 to 25 |
Thermal Diffusivity, mm2/s | 3.3 | |
8.1 |
Thermal Shock Resistance, points | 28 | |
19 to 30 |
Alloy Composition
Carbon (C), % | 0.32 to 0.42 | |
0 to 0.15 |
Chromium (Cr), % | 19 to 21 | |
12 to 14 |
Cobalt (Co), % | 40 to 49.8 | |
0 |
Iron (Fe), % | 0 to 5.0 | |
83.2 to 87.9 |
Manganese (Mn), % | 1.0 to 2.0 | |
0 to 1.3 |
Molybdenum (Mo), % | 3.5 to 4.5 | |
0 |
Nickel (Ni), % | 19 to 21 | |
0 |
Niobium (Nb), % | 3.5 to 4.5 | |
0 |
Phosphorus (P), % | 0 to 0.040 | |
0 to 0.060 |
Silicon (Si), % | 0 to 1.0 | |
0 to 1.0 |
Sulfur (S), % | 0 to 0.030 | |
0.15 to 0.35 |
Tantalum (Ta), % | 3.5 to 4.5 | |
0 |
Tungsten (W), % | 3.5 to 4.5 | |
0 |