ASTM A387 Grade 11 Steel vs. G-CoCr28 Cobalt
ASTM A387 grade 11 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 (5, in this case) are not shown.
For each property being compared, the top bar is ASTM A387 grade 11 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, % | 25 | |
| 6.7 |
| Fatigue Strength, MPa | 200 to 250 | |
| 130 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 500 to 600 | |
| 560 |
| Tensile Strength: Yield (Proof), MPa | 270 to 350 | |
| 260 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 430 | |
| 1200 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1330 |
| Melting Onset (Solidus), °C | 1420 | |
| 1270 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 8.5 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.9 | |
| 100 |
| Density, g/cm3 | 7.8 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 6.2 |
| Embodied Energy, MJ/kg | 21 | |
| 84 |
| Embodied Water, L/kg | 53 | |
| 440 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 130 | |
| 31 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 200 to 320 | |
| 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 | 11 | |
| 2.2 |
| Thermal Shock Resistance, points | 15 to 18 | |
| 14 |
Alloy Composition
| Carbon (C), % | 0.050 to 0.17 | |
| 0.050 to 0.25 |
| Chromium (Cr), % | 1.0 to 1.5 | |
| 27 to 30 |
| Cobalt (Co), % | 0 | |
| 48 to 52 |
| Iron (Fe), % | 96.2 to 97.6 | |
| 9.7 to 24.5 |
| Manganese (Mn), % | 0.4 to 0.65 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0.45 to 0.65 | |
| 0 to 0.5 |
| Nickel (Ni), % | 0 | |
| 0 to 4.0 |
| Niobium (Nb), % | 0 | |
| 0 to 0.5 |
| Phosphorus (P), % | 0 to 0.025 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.5 to 0.8 | |
| 0.5 to 1.5 |
| Sulfur (S), % | 0 to 0.025 | |
| 0 to 0.030 |