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R30016 Cobalt vs. S30600 Stainless Steel

R30016 cobalt belongs to the cobalt alloys classification, while S30600 stainless steel belongs to the iron alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 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 R30016 cobalt and the bottom bar is S30600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 8.4
45
Fatigue Strength, MPa 290
250
Poisson's Ratio 0.28
0.28
Reduction in Area, % 8.0
56
Shear Modulus, GPa 85
76
Tensile Strength: Ultimate (UTS), MPa 1010
610
Tensile Strength: Yield (Proof), MPa 580
270

Thermal Properties

Latent Heat of Fusion, J/g 320
350
Melting Completion (Liquidus), °C 1360
1380
Melting Onset (Solidus), °C 1270
1330
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.5

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.6
Embodied Carbon, kg CO2/kg material 7.7
3.6
Embodied Energy, MJ/kg 110
51
Embodied Water, L/kg 500
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
220
Resilience: Unit (Modulus of Resilience), kJ/m3 770
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33
22
Strength to Weight: Bending, points 26
21
Thermal Diffusivity, mm2/s 3.9
3.7
Thermal Shock Resistance, points 24
14

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.018
Chromium (Cr), % 28 to 32
17 to 18.5
Cobalt (Co), % 49.6 to 66.9
0
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 0 to 3.0
58.9 to 65.3
Manganese (Mn), % 0.5 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 1.5
0 to 0.2
Nickel (Ni), % 0 to 3.0
14 to 15.5
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0.2 to 2.0
3.7 to 4.3
Sulfur (S), % 0
0 to 0.020
Tungsten (W), % 3.5 to 5.5
0