MakeItFrom.com
Menu (ESC)

S66286 Stainless Steel vs. R30021 Cobalt

S66286 stainless steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. 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 S66286 stainless steel and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 17 to 40
9.0
Fatigue Strength, MPa 240 to 410
250
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 620 to 1020
700
Tensile Strength: Yield (Proof), MPa 280 to 670
500

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Melting Completion (Liquidus), °C 1430
1350
Melting Onset (Solidus), °C 1370
1190
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.2
2.1

Otherwise Unclassified Properties

Density, g/cm3 7.9
8.4
Embodied Carbon, kg CO2/kg material 6.0
8.0
Embodied Energy, MJ/kg 87
110
Embodied Water, L/kg 170
520

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 200
57
Resilience: Unit (Modulus of Resilience), kJ/m3 190 to 1150
570
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22 to 36
23
Strength to Weight: Bending, points 20 to 28
21
Thermal Diffusivity, mm2/s 4.0
3.8
Thermal Shock Resistance, points 13 to 22
21

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Boron (B), % 0.0010 to 0.010
0
Carbon (C), % 0 to 0.080
0.2 to 0.35
Chromium (Cr), % 13.5 to 16
26 to 29
Cobalt (Co), % 0
61.7 to 67.3
Iron (Fe), % 49.1 to 59.5
0 to 3.0
Manganese (Mn), % 0 to 2.0
0
Molybdenum (Mo), % 1.0 to 1.5
4.5 to 6.0
Nickel (Ni), % 24 to 27
2.0 to 3.0
Phosphorus (P), % 0 to 0.040
0
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 1.9 to 2.4
0
Vanadium (V), % 0.1 to 0.5
0