SAE-AISI M6 Steel vs. R30155 Cobalt
Both SAE-AISI M6 steel and R30155 cobalt are iron alloys. They have 53% of their average alloy composition in common. There are 22 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 SAE-AISI M6 steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
210 |
Poisson's Ratio | 0.29 | |
0.29 |
Shear Modulus, GPa | 77 | |
81 |
Tensile Strength: Ultimate (UTS), MPa | 840 to 2210 | |
850 |
Thermal Properties
Latent Heat of Fusion, J/g | 260 | |
300 |
Melting Completion (Liquidus), °C | 1560 | |
1470 |
Melting Onset (Solidus), °C | 1510 | |
1420 |
Specific Heat Capacity, J/kg-K | 440 | |
450 |
Thermal Conductivity, W/m-K | 17 | |
12 |
Thermal Expansion, µm/m-K | 12 | |
14 |
Otherwise Unclassified Properties
Base Metal Price, % relative | 39 | |
80 |
Density, g/cm3 | 8.4 | |
8.5 |
Embodied Carbon, kg CO2/kg material | 8.0 | |
9.7 |
Embodied Energy, MJ/kg | 120 | |
150 |
Embodied Water, L/kg | 160 | |
300 |
Common Calculations
PREN (Pitting Resistance) | 28 | |
37 |
Stiffness to Weight: Axial, points | 13 | |
14 |
Stiffness to Weight: Bending, points | 23 | |
23 |
Strength to Weight: Axial, points | 28 to 73 | |
28 |
Strength to Weight: Bending, points | 24 to 45 | |
24 |
Thermal Diffusivity, mm2/s | 4.7 | |
3.2 |
Thermal Shock Resistance, points | 26 to 68 | |
21 |
Alloy Composition
Carbon (C), % | 0.75 to 0.85 | |
0.080 to 0.16 |
Chromium (Cr), % | 3.8 to 4.5 | |
20 to 22.5 |
Cobalt (Co), % | 11 to 13 | |
18.5 to 21 |
Iron (Fe), % | 68.8 to 74.6 | |
24.3 to 36.2 |
Manganese (Mn), % | 0.15 to 0.4 | |
1.0 to 2.0 |
Molybdenum (Mo), % | 4.5 to 5.5 | |
2.5 to 3.5 |
Nickel (Ni), % | 0 | |
19 to 21 |
Niobium (Nb), % | 0 | |
0.75 to 1.3 |
Nitrogen (N), % | 0 | |
0 to 0.2 |
Phosphorus (P), % | 0 to 0.030 | |
0 to 0.040 |
Silicon (Si), % | 0.2 to 0.45 | |
0 to 1.0 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.030 |
Tantalum (Ta), % | 0 | |
0.75 to 1.3 |
Tungsten (W), % | 3.8 to 4.8 | |
2.0 to 3.0 |
Vanadium (V), % | 1.3 to 1.7 | |
0 |