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R30006 Cobalt vs. EN 1.8831 Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.8831 steel belongs to the iron alloys. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is EN 1.8831 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
19
Fatigue Strength, MPa 260
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 900
630
Tensile Strength: Yield (Proof), MPa 540
480

Thermal Properties

Latent Heat of Fusion, J/g 320
250
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
49
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.7
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.6
7.8
Embodied Carbon, kg CO2/kg material 7.8
1.6
Embodied Energy, MJ/kg 110
21
Embodied Water, L/kg 500
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
110
Resilience: Unit (Modulus of Resilience), kJ/m3 670
620
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
22
Strength to Weight: Bending, points 24
21
Thermal Diffusivity, mm2/s 3.9
13
Thermal Shock Resistance, points 26
18

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.040
Carbon (C), % 0.9 to 1.4
0 to 0.16
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Iron (Fe), % 0 to 3.0
96.6 to 99.98
Manganese (Mn), % 0
0 to 1.7
Molybdenum (Mo), % 0 to 1.0
0 to 0.2
Nickel (Ni), % 0 to 3.0
0 to 0.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 0.6
Sulfur (S), % 0
0 to 0.0050
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 4.0 to 6.0
0
Vanadium (V), % 0
0 to 0.1