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R30021 Cobalt vs. EN 1.4419 Stainless Steel

R30021 cobalt belongs to the cobalt alloys classification, while EN 1.4419 stainless steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is R30021 cobalt and the bottom bar is EN 1.4419 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
200
Elongation at Break, % 9.0
11 to 17
Fatigue Strength, MPa 250
230 to 680
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 86
76
Tensile Strength: Ultimate (UTS), MPa 700
660 to 1590
Tensile Strength: Yield (Proof), MPa 500
370 to 1240

Thermal Properties

Latent Heat of Fusion, J/g 330
280
Melting Completion (Liquidus), °C 1350
1440
Melting Onset (Solidus), °C 1190
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Conductivity, W/m-K 15
30
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.2

Otherwise Unclassified Properties

Density, g/cm3 8.4
7.7
Embodied Carbon, kg CO2/kg material 8.0
2.2
Embodied Energy, MJ/kg 110
30
Embodied Water, L/kg 520
110

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57
95 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 570
350 to 3920
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 23
24 to 57
Strength to Weight: Bending, points 21
22 to 39
Thermal Diffusivity, mm2/s 3.8
8.1
Thermal Shock Resistance, points 21
23 to 55

Alloy Composition

Carbon (C), % 0.2 to 0.35
0.36 to 0.42
Chromium (Cr), % 26 to 29
13 to 14.5
Cobalt (Co), % 61.7 to 67.3
0
Iron (Fe), % 0 to 3.0
82 to 86
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 4.5 to 6.0
0.6 to 1.0
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 0.015