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R30016 Cobalt vs. EN 1.1170 Steel

R30016 cobalt belongs to the cobalt alloys classification, while EN 1.1170 steel belongs to the iron alloys. There are 28 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 R30016 cobalt and the bottom bar is EN 1.1170 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 8.4
16 to 17
Fatigue Strength, MPa 290
220 to 330
Impact Strength: V-Notched Charpy, J 8.0
28 to 35
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 1010
640 to 730
Tensile Strength: Yield (Proof), MPa 580
330 to 500

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1270
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
50
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.4

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 7.7
1.5
Embodied Energy, MJ/kg 110
19
Embodied Water, L/kg 500
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
91 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 770
290 to 670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
23 to 26
Strength to Weight: Bending, points 26
21 to 23
Thermal Diffusivity, mm2/s 3.9
13
Thermal Shock Resistance, points 24
20 to 23

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.25 to 0.32
Chromium (Cr), % 28 to 32
0 to 0.4
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
96.7 to 98.5
Manganese (Mn), % 0.5 to 2.0
1.3 to 1.7
Molybdenum (Mo), % 0 to 1.5
0 to 0.1
Nickel (Ni), % 0 to 3.0
0 to 0.4
Phosphorus (P), % 0
0 to 0.035
Silicon (Si), % 0.2 to 2.0
0 to 0.4
Sulfur (S), % 0
0 to 0.035
Tungsten (W), % 3.5 to 5.5
0