R31538 Cobalt vs. EN 1.4020 Stainless Steel
R31538 cobalt belongs to the cobalt alloys classification, while EN 1.4020 stainless steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is EN 1.4020 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 220 | |
200 |
Elongation at Break, % | 13 to 23 | |
13 to 34 |
Fatigue Strength, MPa | 310 to 480 | |
340 to 540 |
Poisson's Ratio | 0.29 | |
0.28 |
Shear Modulus, GPa | 86 | |
77 |
Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
770 to 1130 |
Tensile Strength: Yield (Proof), MPa | 580 to 930 | |
430 to 950 |
Thermal Properties
Latent Heat of Fusion, J/g | 320 | |
280 |
Melting Completion (Liquidus), °C | 1360 | |
1390 |
Melting Onset (Solidus), °C | 1290 | |
1350 |
Specific Heat Capacity, J/kg-K | 450 | |
480 |
Thermal Expansion, µm/m-K | 13 | |
17 |
Otherwise Unclassified Properties
Density, g/cm3 | 8.4 | |
7.6 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
2.5 |
Embodied Energy, MJ/kg | 110 | |
37 |
Embodied Water, L/kg | 530 | |
150 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 200 | |
140 to 220 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 750 to 1920 | |
460 to 2290 |
Stiffness to Weight: Axial, points | 15 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 34 to 45 | |
28 to 41 |
Strength to Weight: Bending, points | 27 to 32 | |
25 to 32 |
Thermal Shock Resistance, points | 25 to 33 | |
16 to 23 |
Alloy Composition
Carbon (C), % | 0.15 to 0.35 | |
0 to 0.15 |
Chromium (Cr), % | 26 to 30 | |
16.5 to 19 |
Cobalt (Co), % | 58.7 to 68.9 | |
0 |
Iron (Fe), % | 0 to 0.75 | |
62.8 to 71.8 |
Manganese (Mn), % | 0 to 1.0 | |
11 to 14 |
Molybdenum (Mo), % | 5.0 to 7.0 | |
0 |
Nickel (Ni), % | 0 to 1.0 | |
0.5 to 2.5 |
Nitrogen (N), % | 0 to 0.25 | |
0.2 to 0.45 |
Phosphorus (P), % | 0 | |
0 to 0.045 |
Silicon (Si), % | 0 to 1.0 | |
0 to 1.0 |
Sulfur (S), % | 0 | |
0 to 0.030 |