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R30016 Cobalt vs. AISI 304N Stainless Steel

R30016 cobalt belongs to the cobalt alloys classification, while AISI 304N 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 27 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R30016 cobalt and the bottom bar is AISI 304N stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 8.4
9.1 to 45
Fatigue Strength, MPa 290
220 to 440
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 1010
620 to 1180
Tensile Strength: Yield (Proof), MPa 580
270 to 850

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1360
1420
Melting Onset (Solidus), °C 1270
1380
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
2.7

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 7.7
3.0
Embodied Energy, MJ/kg 110
43
Embodied Water, L/kg 500
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
98 to 280
Resilience: Unit (Modulus of Resilience), kJ/m3 770
180 to 1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 33
22 to 42
Strength to Weight: Bending, points 26
21 to 32
Thermal Diffusivity, mm2/s 3.9
4.2
Thermal Shock Resistance, points 24
14 to 26

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.080
Chromium (Cr), % 28 to 32
18 to 20
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
66.4 to 73.9
Manganese (Mn), % 0.5 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 1.5
0
Nickel (Ni), % 0 to 3.0
8.0 to 10.5
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0
0 to 0.045
Silicon (Si), % 0.2 to 2.0
0 to 0.75
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 3.5 to 5.5
0