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R30006 Cobalt vs. EN 1.7366 Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.7366 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is EN 1.7366 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
17 to 19
Fatigue Strength, MPa 260
160 to 320
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
74
Tensile Strength: Ultimate (UTS), MPa 900
460 to 710
Tensile Strength: Yield (Proof), MPa 540
230 to 480

Thermal Properties

Latent Heat of Fusion, J/g 320
260
Melting Completion (Liquidus), °C 1400
1460
Melting Onset (Solidus), °C 1290
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
8.1
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
9.3

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
1.7
Embodied Energy, MJ/kg 110
23
Embodied Water, L/kg 500
69

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
74 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 670
140 to 600
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 29
16 to 25
Strength to Weight: Bending, points 24
17 to 23
Thermal Diffusivity, mm2/s 3.9
11
Thermal Shock Resistance, points 26
13 to 20

Alloy Composition

Carbon (C), % 0.9 to 1.4
0 to 0.18
Chromium (Cr), % 27 to 32
4.0 to 6.0
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
91.9 to 95.3
Manganese (Mn), % 0
0.3 to 0.8
Molybdenum (Mo), % 0 to 1.0
0.45 to 0.65
Nickel (Ni), % 0 to 3.0
0
Phosphorus (P), % 0
0 to 0.025
Silicon (Si), % 0 to 2.0
0 to 0.4
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 4.0 to 6.0
0