R30008 Cobalt vs. SAE-AISI D3 Steel
R30008 cobalt belongs to the cobalt alloys classification, while SAE-AISI D3 steel belongs to the iron alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is R30008 cobalt and the bottom bar is SAE-AISI D3 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 210 | |
190 |
Elongation at Break, % | 1.1 to 73 | |
9.8 to 15 |
Fatigue Strength, MPa | 320 to 530 | |
310 to 940 |
Poisson's Ratio | 0.29 | |
0.28 |
Shear Modulus, GPa | 83 | |
74 |
Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
770 to 2050 |
Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
480 to 1550 |
Thermal Properties
Latent Heat of Fusion, J/g | 320 | |
270 |
Melting Completion (Liquidus), °C | 1400 | |
1430 |
Melting Onset (Solidus), °C | 1330 | |
1390 |
Specific Heat Capacity, J/kg-K | 450 | |
480 |
Thermal Expansion, µm/m-K | 13 | |
12 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 95 | |
8.0 |
Density, g/cm3 | 8.4 | |
7.7 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
3.2 |
Embodied Energy, MJ/kg | 110 | |
48 |
Embodied Water, L/kg | 400 | |
100 |
Common Calculations
Stiffness to Weight: Axial, points | 14 | |
14 |
Stiffness to Weight: Bending, points | 24 | |
25 |
Strength to Weight: Axial, points | 31 to 56 | |
28 to 74 |
Strength to Weight: Bending, points | 25 to 37 | |
24 to 47 |
Thermal Shock Resistance, points | 25 to 44 | |
23 to 63 |
Alloy Composition
Boron (B), % | 0 to 0.0010 | |
0 |
Carbon (C), % | 0 to 0.15 | |
2.0 to 2.4 |
Chromium (Cr), % | 18.5 to 21.5 | |
11 to 13.5 |
Cobalt (Co), % | 39 to 42 | |
0 |
Copper (Cu), % | 0 | |
0 to 0.25 |
Iron (Fe), % | 7.6 to 20 | |
80.3 to 87 |
Manganese (Mn), % | 1.0 to 2.0 | |
0 to 0.6 |
Molybdenum (Mo), % | 6.5 to 7.5 | |
0 |
Nickel (Ni), % | 15 to 18 | |
0 to 0.3 |
Phosphorus (P), % | 0 to 0.015 | |
0 to 0.030 |
Silicon (Si), % | 0 to 1.2 | |
0 to 0.6 |
Sulfur (S), % | 0 to 0.015 | |
0 to 0.030 |
Tungsten (W), % | 0 | |
0 to 1.0 |
Vanadium (V), % | 0 | |
0 to 1.0 |