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R30605 Cobalt vs. R31233 Cobalt

Both R30605 cobalt and R31233 cobalt are cobalt alloys. They have 85% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is R30605 cobalt and the bottom bar is R31233 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
220
Elongation at Break, % 34
17
Fatigue Strength, MPa 260 to 590
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
85
Tensile Strength: Ultimate (UTS), MPa 1130 to 1900
1020
Tensile Strength: Yield (Proof), MPa 470 to 1600
420

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1410
1350
Melting Onset (Solidus), °C 1330
1330
Specific Heat Capacity, J/kg-K 410
440
Thermal Conductivity, W/m-K 9.6
12
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
2.1

Otherwise Unclassified Properties

Density, g/cm3 9.6
8.6
Embodied Carbon, kg CO2/kg material 9.8
8.4
Embodied Energy, MJ/kg 140
110
Embodied Water, L/kg 450
480

Common Calculations

Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 33 to 55
33
Strength to Weight: Bending, points 25 to 36
26
Thermal Diffusivity, mm2/s 2.5
3.2
Thermal Shock Resistance, points 31 to 52
25

Alloy Composition

Boron (B), % 0
0 to 0.015
Carbon (C), % 0.050 to 0.15
0.020 to 0.1
Chromium (Cr), % 19 to 21
23.5 to 27.5
Cobalt (Co), % 46.4 to 57
44.7 to 63.3
Iron (Fe), % 0 to 3.0
1.0 to 5.0
Manganese (Mn), % 1.0 to 2.0
0.1 to 1.5
Molybdenum (Mo), % 0
4.0 to 6.0
Nickel (Ni), % 9.0 to 11
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.4
0.050 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 14 to 16
1.0 to 3.0