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R30006 Cobalt vs. EN 1.8881 Steel

R30006 cobalt belongs to the cobalt alloys classification, while EN 1.8881 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 1.8881 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 1.0
16
Fatigue Strength, MPa 260
460
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 900
830
Tensile Strength: Yield (Proof), MPa 540
710

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
1.9
Embodied Energy, MJ/kg 110
26
Embodied Water, L/kg 500
54

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 7.8
120
Resilience: Unit (Modulus of Resilience), kJ/m3 670
1320
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 29
29
Strength to Weight: Bending, points 24
25
Thermal Diffusivity, mm2/s 3.9
11
Thermal Shock Resistance, points 26
24

Alloy Composition

Boron (B), % 0
0 to 0.0050
Carbon (C), % 0.9 to 1.4
0 to 0.2
Chromium (Cr), % 27 to 32
0 to 1.5
Cobalt (Co), % 48.6 to 68.1
0
Copper (Cu), % 0
0 to 0.3
Iron (Fe), % 0 to 3.0
91.9 to 100
Manganese (Mn), % 0
0 to 1.7
Molybdenum (Mo), % 0 to 1.0
0 to 0.7
Nickel (Ni), % 0 to 3.0
0 to 2.5
Niobium (Nb), % 0
0 to 0.060
Nitrogen (N), % 0
0 to 0.015
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0 to 2.0
0 to 0.8
Sulfur (S), % 0
0 to 0.0080
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 4.0 to 6.0
0
Vanadium (V), % 0
0 to 0.12
Zirconium (Zr), % 0
0 to 0.15