SAE-AISI A7 Steel vs. EN 2.4964 Cobalt
SAE-AISI A7 steel belongs to the iron alloys classification, while EN 2.4964 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is EN 2.4964 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 72 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 800 to 2150 | |
| 960 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 290 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1630 |
| Melting Onset (Solidus), °C | 1430 | |
| 1550 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 400 |
| Thermal Conductivity, W/m-K | 37 | |
| 15 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 7.7 | |
| 9.6 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 9.8 |
| Embodied Energy, MJ/kg | 200 | |
| 140 |
| Embodied Water, L/kg | 100 | |
| 450 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 25 | |
| 21 |
| Strength to Weight: Axial, points | 29 to 77 | |
| 28 |
| Strength to Weight: Bending, points | 25 to 48 | |
| 23 |
| Thermal Diffusivity, mm2/s | 10 | |
| 3.9 |
| Thermal Shock Resistance, points | 27 to 72 | |
| 25 |
Alloy Composition
| Carbon (C), % | 2.0 to 2.9 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 5.0 to 5.8 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 46.4 to 58 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 |
| Iron (Fe), % | 81.4 to 87.7 | |
| 0 to 3.0 |
| Manganese (Mn), % | 0 to 0.8 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 0.9 to 1.4 | |
| 0 |
| Nickel (Ni), % | 0 to 0.3 | |
| 9.0 to 11 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tungsten (W), % | 0.5 to 1.5 | |
| 14 to 16 |
| Vanadium (V), % | 3.9 to 5.2 | |
| 0 |