R30155 Cobalt vs. ZA-27
R30155 cobalt belongs to the iron alloys classification, while ZA-27 belongs to the zinc alloys. There are 29 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is ZA-27.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 100 to 120 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 78 |
| Elongation at Break, % | 34 | |
| 2.0 to 4.5 |
| Fatigue Strength, MPa | 310 | |
| 110 to 170 |
| Poisson's Ratio | 0.29 | |
| 0.27 |
| Shear Modulus, GPa | 81 | |
| 31 |
| Shear Strength, MPa | 570 | |
| 230 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 400 to 430 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 260 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 130 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 120 |
| Melting Completion (Liquidus), °C | 1470 | |
| 480 |
| Melting Onset (Solidus), °C | 1420 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 530 |
| Thermal Conductivity, W/m-K | 12 | |
| 130 |
| Thermal Expansion, µm/m-K | 14 | |
| 26 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 11 |
| Density, g/cm3 | 8.5 | |
| 5.0 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 4.2 |
| Embodied Energy, MJ/kg | 150 | |
| 80 |
| Embodied Water, L/kg | 300 | |
| 570 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 8.1 to 18 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 420 to 890 |
| Stiffness to Weight: Axial, points | 14 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 23 | |
| 28 |
| Strength to Weight: Axial, points | 28 | |
| 22 to 24 |
| Strength to Weight: Bending, points | 24 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 47 |
| Thermal Shock Resistance, points | 21 | |
| 14 to 15 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 25 to 28 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.080 to 0.16 | |
| 0 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 2.0 to 2.5 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 0 | |
| 0.010 to 0.020 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 to 0.020 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.080 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.0030 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 69.3 to 73 |