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R30155 Cobalt vs. K93050 Alloy

Both R30155 cobalt and K93050 alloy are iron alloys. They have 51% of their average alloy composition in common. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is R30155 cobalt and the bottom bar is K93050 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 81
72
Tensile Strength: Ultimate (UTS), MPa 850
500 to 680

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Melting Completion (Liquidus), °C 1470
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 450
460
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 80
26
Density, g/cm3 8.5
8.2
Embodied Carbon, kg CO2/kg material 9.7
4.7
Embodied Energy, MJ/kg 150
65
Embodied Water, L/kg 300
120

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 28
17 to 23
Strength to Weight: Bending, points 24
17 to 21
Thermal Shock Resistance, points 21
16 to 21

Alloy Composition

Carbon (C), % 0.080 to 0.16
0 to 0.15
Chromium (Cr), % 20 to 22.5
0 to 0.25
Cobalt (Co), % 18.5 to 21
0 to 0.5
Iron (Fe), % 24.3 to 36.2
61.4 to 63.9
Manganese (Mn), % 1.0 to 2.0
0 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
36
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Selenium (Se), % 0
0.15 to 0.3
Silicon (Si), % 0 to 1.0
0 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.020
Tantalum (Ta), % 0.75 to 1.3
0
Tungsten (W), % 2.0 to 3.0
0