R30075 Cobalt vs. SAE-AISI M44 Steel
R30075 cobalt belongs to the cobalt alloys classification, while SAE-AISI M44 steel belongs to the iron alloys. They have a modest 24% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 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 R30075 cobalt and the bottom bar is SAE-AISI M44 steel.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 210 to 250 | |
200 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 82 to 98 | |
78 |
Tensile Strength: Ultimate (UTS), MPa | 780 to 1280 | |
870 to 2290 |
Thermal Properties
Latent Heat of Fusion, J/g | 320 | |
270 |
Melting Completion (Liquidus), °C | 1360 | |
1590 |
Melting Onset (Solidus), °C | 1290 | |
1540 |
Specific Heat Capacity, J/kg-K | 450 | |
440 |
Thermal Conductivity, W/m-K | 13 | |
14 |
Thermal Expansion, µm/m-K | 12 | |
12 |
Otherwise Unclassified Properties
Density, g/cm3 | 8.4 | |
8.4 |
Embodied Carbon, kg CO2/kg material | 8.1 | |
9.9 |
Embodied Energy, MJ/kg | 110 | |
150 |
Embodied Water, L/kg | 530 | |
170 |
Common Calculations
Stiffness to Weight: Axial, points | 14 to 17 | |
13 |
Stiffness to Weight: Bending, points | 24 to 25 | |
23 |
Strength to Weight: Axial, points | 26 to 42 | |
28 to 75 |
Strength to Weight: Bending, points | 22 to 31 | |
24 to 46 |
Thermal Diffusivity, mm2/s | 3.5 | |
3.7 |
Thermal Shock Resistance, points | 21 to 29 | |
27 to 70 |
Alloy Composition
Aluminum (Al), % | 0 to 0.1 | |
0 |
Boron (B), % | 0 to 0.010 | |
0 |
Carbon (C), % | 0 to 0.35 | |
1.1 to 1.2 |
Chromium (Cr), % | 27 to 30 | |
4.0 to 4.8 |
Cobalt (Co), % | 58.7 to 68 | |
11 to 12.3 |
Copper (Cu), % | 0 | |
0 to 0.25 |
Iron (Fe), % | 0 to 0.75 | |
65.3 to 70.6 |
Manganese (Mn), % | 0 to 1.0 | |
0.2 to 0.4 |
Molybdenum (Mo), % | 5.0 to 7.0 | |
6.0 to 7.0 |
Nickel (Ni), % | 0 to 0.5 | |
0 to 0.3 |
Nitrogen (N), % | 0 to 0.25 | |
0 |
Phosphorus (P), % | 0 to 0.020 | |
0 to 0.030 |
Silicon (Si), % | 0 to 1.0 | |
0.3 to 0.55 |
Sulfur (S), % | 0 to 0.010 | |
0 to 0.030 |
Titanium (Ti), % | 0 to 0.1 | |
0 |
Tungsten (W), % | 0 to 0.2 | |
5.0 to 5.8 |
Vanadium (V), % | 0 | |
1.9 to 2.2 |