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R30816 Cobalt vs. R30008 Cobalt

Both R30816 cobalt and R30008 cobalt are cobalt alloys. They have 86% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is R30816 cobalt and the bottom bar is R30008 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
210
Elongation at Break, % 23
1.1 to 73
Fatigue Strength, MPa 250
320 to 530
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 81
83
Tensile Strength: Ultimate (UTS), MPa 1020
950 to 1700
Tensile Strength: Yield (Proof), MPa 460
500 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 300
320
Melting Completion (Liquidus), °C 1540
1400
Melting Onset (Solidus), °C 1460
1330
Specific Heat Capacity, J/kg-K 420
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 9.1
8.4
Embodied Carbon, kg CO2/kg material 20
8.1
Embodied Energy, MJ/kg 320
110
Embodied Water, L/kg 440
400

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 510
590 to 2720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 31
31 to 56
Strength to Weight: Bending, points 25
25 to 37
Thermal Shock Resistance, points 28
25 to 44

Alloy Composition

Boron (B), % 0
0 to 0.0010
Carbon (C), % 0.32 to 0.42
0 to 0.15
Chromium (Cr), % 19 to 21
18.5 to 21.5
Cobalt (Co), % 40 to 49.8
39 to 42
Iron (Fe), % 0 to 5.0
7.6 to 20
Manganese (Mn), % 1.0 to 2.0
1.0 to 2.0
Molybdenum (Mo), % 3.5 to 4.5
6.5 to 7.5
Nickel (Ni), % 19 to 21
15 to 18
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.015
Silicon (Si), % 0 to 1.0
0 to 1.2
Sulfur (S), % 0 to 0.030
0 to 0.015
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0