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R30016 Cobalt vs. EN 1.1121 Steel

R30016 cobalt belongs to the cobalt alloys classification, while EN 1.1121 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 R30016 cobalt and the bottom bar is EN 1.1121 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 8.4
28
Fatigue Strength, MPa 290
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 1010
400
Tensile Strength: Yield (Proof), MPa 580
210

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
53
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.0

Otherwise Unclassified Properties

Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 7.7
1.4
Embodied Energy, MJ/kg 110
18
Embodied Water, L/kg 500
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
93
Resilience: Unit (Modulus of Resilience), kJ/m3 770
110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
14
Strength to Weight: Bending, points 26
15
Thermal Diffusivity, mm2/s 3.9
14
Thermal Shock Resistance, points 24
13

Alloy Composition

Carbon (C), % 0.9 to 1.4
0.070 to 0.13
Chromium (Cr), % 28 to 32
0
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
98.8 to 99.63
Manganese (Mn), % 0.5 to 2.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 1.5
0
Nickel (Ni), % 0 to 3.0
0
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