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R30006 Cobalt vs. AISI 316L Stainless Steel

R30006 cobalt belongs to the cobalt alloys classification, while AISI 316L stainless steel belongs to the iron alloys. They have a modest 21% 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 (9, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AISI 316L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
9.0 to 50
Fatigue Strength, MPa 260
170 to 450
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
78
Tensile Strength: Ultimate (UTS), MPa 900
530 to 1160
Tensile Strength: Yield (Proof), MPa 540
190 to 870

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1290
1380
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.6

Otherwise Unclassified Properties

Calomel Potential, mV -250
-50
Density, g/cm3 8.6
7.9
Embodied Carbon, kg CO2/kg material 7.8
3.9
Embodied Energy, MJ/kg 110
53
Embodied Water, L/kg 500
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
77 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 670
93 to 1880
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
19 to 41
Strength to Weight: Bending, points 24
18 to 31
Thermal Diffusivity, mm2/s 3.9
4.1
Thermal Shock Resistance, points 26
12 to 25

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.030
Chromium (Cr), % 27 to 32
16 to 18
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
62 to 72
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0 to 1.0
2.0 to 3.0
Nickel (Ni), % 0 to 3.0
10 to 14
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 4.0 to 6.0
0