MakeItFrom.com
Menu (ESC)

Nickel 718 vs. R30012 Cobalt

Nickel 718 belongs to the nickel alloys classification, while R30012 cobalt belongs to the cobalt alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is nickel 718 and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Elongation at Break, % 12 to 50
1.0
Fatigue Strength, MPa 460 to 760
320
Poisson's Ratio 0.29
0.28
Rockwell C Hardness 40
48
Shear Modulus, GPa 75
86
Tensile Strength: Ultimate (UTS), MPa 930 to 1530
830
Tensile Strength: Yield (Proof), MPa 510 to 1330
650

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1340
1470
Melting Onset (Solidus), °C 1260
1280
Specific Heat Capacity, J/kg-K 450
440
Thermal Conductivity, W/m-K 11
15
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.4
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 1.5
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.3
8.8
Embodied Carbon, kg CO2/kg material 13
8.3
Embodied Energy, MJ/kg 190
120
Embodied Water, L/kg 250
480

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 390
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 660 to 4560
960
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 31 to 51
26
Strength to Weight: Bending, points 25 to 35
22
Thermal Diffusivity, mm2/s 3.0
3.8
Thermal Shock Resistance, points 27 to 44
23

Alloy Composition

Aluminum (Al), % 0.2 to 0.8
0
Boron (B), % 0 to 0.0060
0
Carbon (C), % 0 to 0.080
1.4 to 2.0
Chromium (Cr), % 17 to 21
27 to 32
Cobalt (Co), % 0 to 1.0
47.5 to 64.1
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 11.1 to 24.6
0 to 3.0
Manganese (Mn), % 0 to 0.35
0
Molybdenum (Mo), % 2.8 to 3.3
0 to 1.0
Nickel (Ni), % 50 to 55
0 to 3.0
Niobium (Nb), % 4.8 to 5.5
0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.35
0 to 2.0
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0.65 to 1.2
0
Tungsten (W), % 0
7.5 to 9.5