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R30021 Cobalt vs. EN 1.3543 Stainless Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.3543 stainless steel belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is EN 1.3543 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 700
730

Thermal Properties

Latent Heat of Fusion, J/g 330
280
Melting Completion (Liquidus), °C 1350
1430
Melting Onset (Solidus), °C 1190
1390
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
22
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.3
Embodied Energy, MJ/kg 110
32
Embodied Water, L/kg 520
120

Common Calculations

Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23
27
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 3.8
6.1
Thermal Shock Resistance, points 21
26

Alloy Composition

Carbon (C), % 0.2 to 0.35
1.0 to 1.2
Chromium (Cr), % 26 to 29
16 to 18
Cobalt (Co), % 61.7 to 67.3
0
Iron (Fe), % 0 to 3.0
79.1 to 83.6
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 4.5 to 6.0
0.4 to 0.8
Nickel (Ni), % 2.0 to 3.0
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0
0 to 0.030