ACI-ASTM CA15M Steel vs. R31233 Cobalt
ACI-ASTM CA15M steel belongs to the iron alloys classification, while R31233 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is ACI-ASTM CA15M steel and the bottom bar is R31233 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
220 |
Elongation at Break, % | 20 | |
17 |
Fatigue Strength, MPa | 330 | |
220 |
Poisson's Ratio | 0.28 | |
0.29 |
Shear Modulus, GPa | 76 | |
85 |
Tensile Strength: Ultimate (UTS), MPa | 690 | |
1020 |
Tensile Strength: Yield (Proof), MPa | 510 | |
420 |
Thermal Properties
Latent Heat of Fusion, J/g | 270 | |
320 |
Melting Completion (Liquidus), °C | 1450 | |
1350 |
Melting Onset (Solidus), °C | 1410 | |
1330 |
Specific Heat Capacity, J/kg-K | 480 | |
440 |
Thermal Conductivity, W/m-K | 27 | |
12 |
Thermal Expansion, µm/m-K | 10 | |
13 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 3.0 | |
2.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 3.5 | |
2.1 |
Otherwise Unclassified Properties
Density, g/cm3 | 7.8 | |
8.6 |
Embodied Carbon, kg CO2/kg material | 2.1 | |
8.4 |
Embodied Energy, MJ/kg | 29 | |
110 |
Embodied Water, L/kg | 100 | |
480 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 | |
140 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 670 | |
410 |
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 25 | |
23 |
Strength to Weight: Axial, points | 25 | |
33 |
Strength to Weight: Bending, points | 22 | |
26 |
Thermal Diffusivity, mm2/s | 7.2 | |
3.2 |
Thermal Shock Resistance, points | 25 | |
25 |
Alloy Composition
Boron (B), % | 0 | |
0 to 0.015 |
Carbon (C), % | 0 to 0.15 | |
0.020 to 0.1 |
Chromium (Cr), % | 11.5 to 14 | |
23.5 to 27.5 |
Cobalt (Co), % | 0 | |
44.7 to 63.3 |
Iron (Fe), % | 82.1 to 88.4 | |
1.0 to 5.0 |
Manganese (Mn), % | 0 to 1.0 | |
0.1 to 1.5 |
Molybdenum (Mo), % | 0.15 to 1.0 | |
4.0 to 6.0 |
Nickel (Ni), % | 0 to 1.0 | |
7.0 to 11 |
Nitrogen (N), % | 0 | |
0.030 to 0.12 |
Phosphorus (P), % | 0 to 0.040 | |
0 to 0.030 |
Silicon (Si), % | 0 to 0.65 | |
0.050 to 1.0 |
Sulfur (S), % | 0 to 0.040 | |
0 to 0.020 |
Tungsten (W), % | 0 | |
1.0 to 3.0 |