ASTM A204 Steel vs. G-CoCr28 Cobalt
ASTM A204 steel belongs to the iron alloys classification, while G-CoCr28 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is ASTM A204 steel and the bottom bar is G-CoCr28 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 18 to 22 | |
| 6.7 |
| Fatigue Strength, MPa | 200 to 220 | |
| 130 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 590 | |
| 560 |
| Tensile Strength: Yield (Proof), MPa | 290 to 330 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 1200 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1330 |
| Melting Onset (Solidus), °C | 1420 to 1430 | |
| 1270 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 52 | |
| 8.5 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.4 | |
| 100 |
| Density, g/cm3 | 7.9 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 6.2 |
| Embodied Energy, MJ/kg | 20 | |
| 84 |
| Embodied Water, L/kg | 47 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 90 to 95 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 220 to 290 | |
| 160 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 18 to 21 | |
| 19 |
| Strength to Weight: Bending, points | 18 to 20 | |
| 19 |
| Thermal Diffusivity, mm2/s | 14 | |
| 2.2 |
| Thermal Shock Resistance, points | 15 to 17 | |
| 14 |