S35500 Stainless Steel vs. R30075 Cobalt
S35500 stainless steel belongs to the iron alloys classification, while R30075 cobalt belongs to the cobalt alloys. There are 27 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 S35500 stainless steel and the bottom bar is R30075 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
Elastic (Young's, Tensile) Modulus, GPa | 200 | |
210 to 250 |
Elongation at Break, % | 14 | |
12 |
Fatigue Strength, MPa | 690 to 730 | |
250 to 840 |
Poisson's Ratio | 0.28 | |
0.29 |
Shear Modulus, GPa | 78 | |
82 to 98 |
Tensile Strength: Ultimate (UTS), MPa | 1330 to 1490 | |
780 to 1280 |
Tensile Strength: Yield (Proof), MPa | 1200 to 1280 | |
480 to 840 |
Thermal Properties
Latent Heat of Fusion, J/g | 280 | |
320 |
Melting Completion (Liquidus), °C | 1460 | |
1360 |
Melting Onset (Solidus), °C | 1420 | |
1290 |
Specific Heat Capacity, J/kg-K | 470 | |
450 |
Thermal Conductivity, W/m-K | 16 | |
13 |
Thermal Expansion, µm/m-K | 11 | |
12 |
Electrical Properties
Electrical Conductivity: Equal Volume, % IACS | 2.2 | |
2.0 |
Electrical Conductivity: Equal Weight (Specific), % IACS | 2.5 | |
2.1 |
Otherwise Unclassified Properties
Density, g/cm3 | 7.8 | |
8.4 |
Embodied Carbon, kg CO2/kg material | 3.5 | |
8.1 |
Embodied Energy, MJ/kg | 47 | |
110 |
Embodied Water, L/kg | 130 | |
530 |
Common Calculations
Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 180 to 190 | |
84 to 140 |
Resilience: Unit (Modulus of Resilience), kJ/m3 | 3610 to 4100 | |
560 to 1410 |
Stiffness to Weight: Axial, points | 14 | |
14 to 17 |
Stiffness to Weight: Bending, points | 25 | |
24 to 25 |
Strength to Weight: Axial, points | 47 to 53 | |
26 to 42 |
Strength to Weight: Bending, points | 34 to 37 | |
22 to 31 |
Thermal Diffusivity, mm2/s | 4.4 | |
3.5 |
Thermal Shock Resistance, points | 44 to 49 | |
21 to 29 |
Alloy Composition
Aluminum (Al), % | 0 | |
0 to 0.1 |
Boron (B), % | 0 | |
0 to 0.010 |
Carbon (C), % | 0.1 to 0.15 | |
0 to 0.35 |
Chromium (Cr), % | 15 to 16 | |
27 to 30 |
Cobalt (Co), % | 0 | |
58.7 to 68 |
Iron (Fe), % | 73.2 to 77.7 | |
0 to 0.75 |
Manganese (Mn), % | 0.5 to 1.3 | |
0 to 1.0 |
Molybdenum (Mo), % | 2.5 to 3.2 | |
5.0 to 7.0 |
Nickel (Ni), % | 4.0 to 5.0 | |
0 to 0.5 |
Niobium (Nb), % | 0.1 to 0.5 | |
0 |
Nitrogen (N), % | 0.070 to 0.13 | |
0 to 0.25 |
Phosphorus (P), % | 0 to 0.040 | |
0 to 0.020 |
Silicon (Si), % | 0 to 0.5 | |
0 to 1.0 |
Sulfur (S), % | 0 to 0.030 | |
0 to 0.010 |
Titanium (Ti), % | 0 | |
0 to 0.1 |
Tungsten (W), % | 0 | |
0 to 0.2 |