MakeItFrom.com
Menu (ESC)

R30006 Cobalt vs. AISI 303 Stainless Steel

R30006 cobalt belongs to the cobalt alloys classification, while AISI 303 stainless steel belongs to the iron alloys. They have a modest 22% 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 (8, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AISI 303 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
40 to 51
Fatigue Strength, MPa 260
230 to 360
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 900
600 to 690
Tensile Strength: Yield (Proof), MPa 540
230 to 420

Thermal Properties

Latent Heat of Fusion, J/g 320
290
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1290
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
2.8

Otherwise Unclassified Properties

Calomel Potential, mV -250
-80
Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
3.0
Embodied Energy, MJ/kg 110
42
Embodied Water, L/kg 500
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
240
Resilience: Unit (Modulus of Resilience), kJ/m3 670
140 to 440
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
21 to 25
Strength to Weight: Bending, points 24
20 to 22
Thermal Diffusivity, mm2/s 3.9
4.4
Thermal Shock Resistance, points 26
13 to 15

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.15
Chromium (Cr), % 27 to 32
17 to 19
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
67.3 to 74.9
Manganese (Mn), % 0
0 to 2.0
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
8.0 to 10
Phosphorus (P), % 0
0 to 0.2
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0.15 to 0.35
Tungsten (W), % 4.0 to 6.0
0