MakeItFrom.com
Menu (ESC)

Nickel 718 vs. R30008 Cobalt

Nickel 718 belongs to the nickel alloys classification, while R30008 cobalt belongs to the cobalt alloys. They have 53% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is nickel 718 and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 12 to 50
1.1 to 73
Fatigue Strength, MPa 460 to 760
320 to 530
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 75
83
Tensile Strength: Ultimate (UTS), MPa 930 to 1530
950 to 1700
Tensile Strength: Yield (Proof), MPa 510 to 1330
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Melting Completion (Liquidus), °C 1340
1400
Melting Onset (Solidus), °C 1260
1330
Specific Heat Capacity, J/kg-K 450
450
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Base Metal Price, % relative 75
95
Density, g/cm3 8.3
8.4
Embodied Carbon, kg CO2/kg material 13
8.1
Embodied Energy, MJ/kg 190
110
Embodied Water, L/kg 250
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 660 to 4560
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 31 to 51
31 to 56
Strength to Weight: Bending, points 25 to 35
25 to 37
Thermal Shock Resistance, points 27 to 44
25 to 44

Alloy Composition

Aluminum (Al), % 0.2 to 0.8
0
Boron (B), % 0 to 0.0060
0 to 0.0010
Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 17 to 21
18.5 to 21.5
Cobalt (Co), % 0 to 1.0
39 to 42
Copper (Cu), % 0 to 0.3
0
Iron (Fe), % 11.1 to 24.6
7.6 to 20
Manganese (Mn), % 0 to 0.35
1.0 to 2.0
Molybdenum (Mo), % 2.8 to 3.3
6.5 to 7.5
Nickel (Ni), % 50 to 55
15 to 18
Niobium (Nb), % 4.8 to 5.5
0
Phosphorus (P), % 0 to 0.015
0 to 0.015
Silicon (Si), % 0 to 0.35
0 to 1.2
Sulfur (S), % 0 to 0.015
0 to 0.015
Titanium (Ti), % 0.65 to 1.2
0