R31538 Cobalt vs. SAE-AISI T1 Steel
R31538 cobalt belongs to the cobalt alloys classification, while SAE-AISI T1 steel belongs to the iron alloys. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is SAE-AISI T1 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 220 | |
200 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 86 | |
80 |
Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
770 to 2130 |
Thermal Properties
Latent Heat of Fusion, J/g | 320 | |
240 |
Melting Completion (Liquidus), °C | 1360 | |
1810 |
Melting Onset (Solidus), °C | 1290 | |
1750 |
Specific Heat Capacity, J/kg-K | 450 | |
410 |
Thermal Conductivity, W/m-K | 13 | |
20 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Otherwise Unclassified Properties
Density, g/cm3 | 8.4 | |
9.3 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
8.2 |
Embodied Energy, MJ/kg | 110 | |
130 |
Embodied Water, L/kg | 530 | |
90 |
Common Calculations
Stiffness to Weight: Axial, points | 15 | |
12 |
Stiffness to Weight: Bending, points | 24 | |
21 |
Strength to Weight: Axial, points | 34 to 45 | |
23 to 64 |
Strength to Weight: Bending, points | 27 to 32 | |
20 to 40 |
Thermal Diffusivity, mm2/s | 3.5 | |
5.2 |
Thermal Shock Resistance, points | 25 to 33 | |
23 to 64 |
Alloy Composition
Carbon (C), % | 0.15 to 0.35 | |
0.65 to 0.8 |
Chromium (Cr), % | 26 to 30 | |
3.8 to 4.5 |
Cobalt (Co), % | 58.7 to 68.9 | |
0 |
Copper (Cu), % | 0 | |
0 to 0.25 |
Iron (Fe), % | 0 to 0.75 | |
73.2 to 77.2 |
Manganese (Mn), % | 0 to 1.0 | |
0.1 to 0.4 |
Molybdenum (Mo), % | 5.0 to 7.0 | |
0 |
Nickel (Ni), % | 0 to 1.0 | |
0 to 0.3 |
Nitrogen (N), % | 0 to 0.25 | |
0 |
Phosphorus (P), % | 0 | |
0 to 0.030 |
Silicon (Si), % | 0 to 1.0 | |
0.2 to 0.4 |
Sulfur (S), % | 0 | |
0 to 0.030 |
Tungsten (W), % | 0 | |
17.3 to 18.8 |
Vanadium (V), % | 0 | |
0.9 to 1.3 |