R30008 Cobalt vs. EN 1.7703 Steel
R30008 cobalt belongs to the cobalt alloys classification, while EN 1.7703 steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is R30008 cobalt and the bottom bar is EN 1.7703 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 210 | |
190 |
Elongation at Break, % | 1.1 to 73 | |
20 |
Fatigue Strength, MPa | 320 to 530 | |
320 to 340 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 83 | |
74 |
Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
670 to 690 |
Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
460 to 500 |
Thermal Properties
Latent Heat of Fusion, J/g | 320 | |
250 |
Melting Completion (Liquidus), °C | 1400 | |
1470 |
Melting Onset (Solidus), °C | 1330 | |
1430 |
Specific Heat Capacity, J/kg-K | 450 | |
470 |
Thermal Expansion, µm/m-K | 13 | |
13 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 95 | |
4.2 |
Density, g/cm3 | 8.4 | |
7.9 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
2.5 |
Embodied Energy, MJ/kg | 110 | |
35 |
Embodied Water, L/kg | 400 | |
61 |
Common Calculations
Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
570 to 650 |
Stiffness to Weight: Axial, points | 14 | |
13 |
Stiffness to Weight: Bending, points | 24 | |
24 |
Strength to Weight: Axial, points | 31 to 56 | |
24 |
Strength to Weight: Bending, points | 25 to 37 | |
22 |
Thermal Shock Resistance, points | 25 to 44 | |
19 to 20 |
Alloy Composition
Boron (B), % | 0 to 0.0010 | |
0 |
Carbon (C), % | 0 to 0.15 | |
0.11 to 0.15 |
Chromium (Cr), % | 18.5 to 21.5 | |
2.0 to 2.5 |
Cobalt (Co), % | 39 to 42 | |
0 |
Copper (Cu), % | 0 | |
0 to 0.2 |
Iron (Fe), % | 7.6 to 20 | |
94.6 to 96.4 |
Manganese (Mn), % | 1.0 to 2.0 | |
0.3 to 0.6 |
Molybdenum (Mo), % | 6.5 to 7.5 | |
0.9 to 1.1 |
Nickel (Ni), % | 15 to 18 | |
0 to 0.25 |
Niobium (Nb), % | 0 | |
0 to 0.070 |
Nitrogen (N), % | 0 | |
0 to 0.012 |
Phosphorus (P), % | 0 to 0.015 | |
0 to 0.015 |
Silicon (Si), % | 0 to 1.2 | |
0 to 0.1 |
Sulfur (S), % | 0 to 0.015 | |
0 to 0.0050 |
Titanium (Ti), % | 0 | |
0 to 0.030 |
Vanadium (V), % | 0 | |
0.25 to 0.35 |