R31538 Cobalt vs. ASTM A216 Cast Steel
R31538 cobalt belongs to the cobalt alloys classification, while ASTM A216 cast steel belongs to the iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is ASTM A216 cast steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 220 | |
190 |
Elongation at Break, % | 13 to 23 | |
25 to 27 |
Fatigue Strength, MPa | 310 to 480 | |
170 to 230 |
Poisson's Ratio | 0.29 | |
0.29 |
Reduction in Area, % | 13 to 22 | |
39 |
Shear Modulus, GPa | 86 | |
72 |
Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
500 to 570 |
Tensile Strength: Yield (Proof), MPa | 580 to 930 | |
230 to 310 |
Thermal Properties
Latent Heat of Fusion, J/g | 320 | |
250 |
Melting Completion (Liquidus), °C | 1360 | |
1450 to 1460 |
Melting Onset (Solidus), °C | 1290 | |
1410 |
Specific Heat Capacity, J/kg-K | 450 | |
470 |
Thermal Conductivity, W/m-K | 13 | |
49 to 52 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
7.1 to 7.2 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
8.2 to 8.3 |
Otherwise Unclassified Properties
Density, g/cm3 | 8.4 | |
7.8 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
1.4 |
Embodied Energy, MJ/kg | 110 | |
18 |
Embodied Water, L/kg | 530 | |
45 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 200 | |
110 to 120 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 750 to 1920 | |
140 to 250 |
Stiffness to Weight: Axial, points | 15 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 34 to 45 | |
18 to 20 |
Strength to Weight: Bending, points | 27 to 32 | |
18 to 20 |
Thermal Diffusivity, mm2/s | 3.5 | |
13 to 14 |
Thermal Shock Resistance, points | 25 to 33 | |
16 to 18 |