EN 1.7321 Steel vs. R30816 Cobalt
EN 1.7321 steel belongs to the iron alloys classification, while R30816 cobalt belongs to the cobalt alloys. There are 21 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 EN 1.7321 steel and the bottom bar is R30816 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Brinell Hardness | 150 to 170 | |
280 |
Elastic (Young's, Tensile) Modulus, GPa | 190 | |
210 |
Poisson's Ratio | 0.29 | |
0.3 |
Shear Modulus, GPa | 73 | |
81 |
Tensile Strength: Ultimate (UTS), MPa | 490 to 1460 | |
1020 |
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 | 45 | |
13 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Otherwise Unclassified Properties
Density, g/cm3 | 7.9 | |
9.1 |
Embodied Carbon, kg CO2/kg material | 1.5 | |
20 |
Embodied Energy, MJ/kg | 20 | |
320 |
Embodied Water, L/kg | 50 | |
440 |
Common Calculations
Stiffness to Weight: Axial, points | 13 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
22 |
Strength to Weight: Axial, points | 17 to 52 | |
31 |
Strength to Weight: Bending, points | 18 to 36 | |
25 |
Thermal Diffusivity, mm2/s | 12 | |
3.3 |
Thermal Shock Resistance, points | 14 to 43 | |
28 |
Alloy Composition
Carbon (C), % | 0.17 to 0.23 | |
0.32 to 0.42 |
Chromium (Cr), % | 0.3 to 0.6 | |
19 to 21 |
Cobalt (Co), % | 0 | |
40 to 49.8 |
Copper (Cu), % | 0 to 0.25 | |
0 |
Iron (Fe), % | 97.1 to 98.4 | |
0 to 5.0 |
Manganese (Mn), % | 0.7 to 1.0 | |
1.0 to 2.0 |
Molybdenum (Mo), % | 0.4 to 0.5 | |
3.5 to 4.5 |
Nickel (Ni), % | 0 | |
19 to 21 |
Niobium (Nb), % | 0 | |
3.5 to 4.5 |
Phosphorus (P), % | 0 to 0.025 | |
0 to 0.040 |
Silicon (Si), % | 0 to 0.3 | |
0 to 1.0 |
Sulfur (S), % | 0 to 0.025 | |
0 to 0.030 |
Tantalum (Ta), % | 0 | |
3.5 to 4.5 |
Tungsten (W), % | 0 | |
3.5 to 4.5 |