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R30008 Cobalt vs. R31233 Cobalt

Both R30008 cobalt and R31233 cobalt are cobalt alloys. They have 79% 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 R30008 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, % 1.1 to 73
17
Fatigue Strength, MPa 320 to 530
220
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 83
85
Tensile Strength: Ultimate (UTS), MPa 950 to 1700
1020
Tensile Strength: Yield (Proof), MPa 500 to 1080
420

Thermal Properties

Latent Heat of Fusion, J/g 320
320
Melting Completion (Liquidus), °C 1400
1350
Melting Onset (Solidus), °C 1330
1330
Specific Heat Capacity, J/kg-K 450
440
Thermal Expansion, µm/m-K 13
13

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.6
Embodied Carbon, kg CO2/kg material 8.1
8.4
Embodied Energy, MJ/kg 110
110
Embodied Water, L/kg 400
480

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 590 to 2720
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 31 to 56
33
Strength to Weight: Bending, points 25 to 37
26
Thermal Shock Resistance, points 25 to 44
25

Alloy Composition

Boron (B), % 0 to 0.0010
0 to 0.015
Carbon (C), % 0 to 0.15
0.020 to 0.1
Chromium (Cr), % 18.5 to 21.5
23.5 to 27.5
Cobalt (Co), % 39 to 42
44.7 to 63.3
Iron (Fe), % 7.6 to 20
1.0 to 5.0
Manganese (Mn), % 1.0 to 2.0
0.1 to 1.5
Molybdenum (Mo), % 6.5 to 7.5
4.0 to 6.0
Nickel (Ni), % 15 to 18
7.0 to 11
Nitrogen (N), % 0
0.030 to 0.12
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 1.2
0.050 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.020
Tungsten (W), % 0
1.0 to 3.0