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R30006 Cobalt vs. S42300 Stainless Steel

R30006 cobalt belongs to the cobalt alloys classification, while S42300 stainless steel belongs to the iron alloys. 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 R30006 cobalt and the bottom bar is S42300 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
9.1
Fatigue Strength, MPa 260
440
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 85
77
Tensile Strength: Ultimate (UTS), MPa 900
1100
Tensile Strength: Yield (Proof), MPa 540
850

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1400
1470
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
4.5
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
5.2

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
3.2
Embodied Energy, MJ/kg 110
44
Embodied Water, L/kg 500
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
93
Resilience: Unit (Modulus of Resilience), kJ/m3 670
1840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
39
Strength to Weight: Bending, points 24
30
Thermal Diffusivity, mm2/s 3.9
6.8
Thermal Shock Resistance, points 26
40

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.27 to 0.32
Chromium (Cr), % 27 to 32
11 to 12
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
82 to 85.1
Manganese (Mn), % 0
1.0 to 1.4
Molybdenum (Mo), % 0 to 1.0
2.5 to 3.0
Nickel (Ni), % 0 to 3.0
0 to 0.5
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0
0 to 0.025
Tungsten (W), % 4.0 to 6.0
0
Vanadium (V), % 0
0.2 to 0.3