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R30001 Cobalt vs. S41425 Stainless Steel

R30001 cobalt belongs to the cobalt alloys classification, while S41425 stainless steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is S41425 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 1.0
17
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 86
77
Tensile Strength: Ultimate (UTS), MPa 620
920

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Melting Completion (Liquidus), °C 1530
1450
Melting Onset (Solidus), °C 1260
1410
Specific Heat Capacity, J/kg-K 430
470
Thermal Conductivity, W/m-K 15
16
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.8
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.7

Otherwise Unclassified Properties

Density, g/cm3 9.0
7.9
Embodied Carbon, kg CO2/kg material 8.9
2.9
Embodied Energy, MJ/kg 130
40
Embodied Water, L/kg 460
120

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 19
33
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 3.7
4.4
Thermal Shock Resistance, points 19
33

Alloy Composition

Carbon (C), % 2.0 to 3.0
0 to 0.050
Chromium (Cr), % 28 to 32
12 to 15
Cobalt (Co), % 43 to 59
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 3.0
74 to 81.9
Manganese (Mn), % 0
0.5 to 1.0
Molybdenum (Mo), % 0 to 1.0
1.5 to 2.0
Nickel (Ni), % 0 to 3.0
4.0 to 7.0
Nitrogen (N), % 0
0.060 to 0.12
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 0.5
Sulfur (S), % 0
0 to 0.0050
Tungsten (W), % 11 to 13
0