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R30016 Cobalt vs. SAE-AISI 51B60 Steel

R30016 cobalt belongs to the cobalt alloys classification, while SAE-AISI 51B60 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 SAE-AISI 51B60 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Elongation at Break, % 8.4
12 to 21
Fatigue Strength, MPa 290
280 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 85
73
Tensile Strength: Ultimate (UTS), MPa 1010
660
Tensile Strength: Yield (Proof), MPa 580
400 to 550

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1360
1450
Melting Onset (Solidus), °C 1270
1410
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 15
43
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
8.3

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
19
Embodied Water, L/kg 500
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 72
73 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 770
420 to 800
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 33
23
Strength to Weight: Bending, points 26
22
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 24
19

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 0.9 to 1.4
0.56 to 0.64
Chromium (Cr), % 28 to 32
0.7 to 0.9
Cobalt (Co), % 49.6 to 66.9
0
Iron (Fe), % 0 to 3.0
97 to 97.8
Manganese (Mn), % 0.5 to 2.0
0.75 to 1.0
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
0.15 to 0.35
Sulfur (S), % 0
0 to 0.040
Tungsten (W), % 3.5 to 5.5
0