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R30001 Cobalt vs. R30155 Cobalt

R30001 cobalt belongs to the cobalt alloys classification, while R30155 cobalt belongs to the iron alloys. They have 48% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is R30001 cobalt and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
210
Elongation at Break, % 1.0
34
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 86
81
Tensile Strength: Ultimate (UTS), MPa 620
850

Thermal Properties

Latent Heat of Fusion, J/g 310
300
Melting Completion (Liquidus), °C 1530
1470
Melting Onset (Solidus), °C 1260
1420
Specific Heat Capacity, J/kg-K 430
450
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Density, g/cm3 9.0
8.5
Embodied Carbon, kg CO2/kg material 8.9
9.7
Embodied Energy, MJ/kg 130
150
Embodied Water, L/kg 460
300

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 19
28
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 3.7
3.2
Thermal Shock Resistance, points 19
21

Alloy Composition

Carbon (C), % 2.0 to 3.0
0.080 to 0.16
Chromium (Cr), % 28 to 32
20 to 22.5
Cobalt (Co), % 43 to 59
18.5 to 21
Iron (Fe), % 0 to 3.0
24.3 to 36.2
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0 to 1.0
2.5 to 3.5
Nickel (Ni), % 0 to 3.0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 11 to 13
2.0 to 3.0