ASTM B817 Type II vs. R30003 Cobalt
ASTM B817 type II belongs to the titanium alloys classification, while R30003 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is ASTM B817 type II and the bottom bar is R30003 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 100 | |
210 |
Elongation at Break, % | 3.0 to 13 | |
10 to 73 |
Fatigue Strength, MPa | 390 to 530 | |
320 to 560 |
Poisson's Ratio | 0.32 | |
0.29 |
Shear Modulus, GPa | 40 | |
83 |
Tensile Strength: Ultimate (UTS), MPa | 900 to 960 | |
970 to 1720 |
Tensile Strength: Yield (Proof), MPa | 780 to 900 | |
510 to 1090 |
Thermal Properties
Latent Heat of Fusion, J/g | 400 | |
310 |
Melting Completion (Liquidus), °C | 1580 | |
1400 |
Melting Onset (Solidus), °C | 1530 | |
1440 |
Specific Heat Capacity, J/kg-K | 550 | |
450 |
Thermal Expansion, µm/m-K | 9.9 | |
13 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 37 | |
95 |
Density, g/cm3 | 4.6 | |
8.4 |
Embodied Carbon, kg CO2/kg material | 40 | |
8.0 |
Embodied Energy, MJ/kg | 650 | |
110 |
Embodied Water, L/kg | 220 | |
400 |
Common Calculations
Resilience: Unit (Modulus of Resilience), kJ/m3 | 2890 to 3890 | |
600 to 2790 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 34 | |
24 |
Strength to Weight: Axial, points | 55 to 58 | |
32 to 57 |
Strength to Weight: Bending, points | 45 to 47 | |
26 to 38 |
Thermal Shock Resistance, points | 62 to 66 | |
26 to 45 |
Alloy Composition
Aluminum (Al), % | 5.0 to 6.0 | |
0 |
Boron (B), % | 0 | |
0 to 0.1 |
Carbon (C), % | 0 to 0.1 | |
0 to 0.15 |
Chlorine (Cl), % | 0 to 0.2 | |
0 |
Chromium (Cr), % | 0 | |
19 to 21 |
Cobalt (Co), % | 0 | |
39 to 41 |
Copper (Cu), % | 0.35 to 1.0 | |
0 |
Hydrogen (H), % | 0 to 0.015 | |
0 |
Iron (Fe), % | 0.35 to 1.0 | |
10 to 20.5 |
Manganese (Mn), % | 0 | |
1.5 to 2.5 |
Molybdenum (Mo), % | 0 | |
6.0 to 8.0 |
Nickel (Ni), % | 0 | |
14 to 16 |
Nitrogen (N), % | 0 to 0.040 | |
0 |
Oxygen (O), % | 0 to 0.3 | |
0 |
Phosphorus (P), % | 0 | |
0 to 0.015 |
Silicon (Si), % | 0 to 0.1 | |
0 to 1.2 |
Sodium (Na), % | 0 to 0.2 | |
0 |
Sulfur (S), % | 0 | |
0 to 0.015 |
Tin (Sn), % | 1.5 to 2.5 | |
0 |
Titanium (Ti), % | 82.1 to 87.8 | |
0 |
Vanadium (V), % | 5.0 to 6.0 | |
0 |
Residuals, % | 0 to 0.4 | |
0 |