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R31538 Cobalt vs. K93050 Alloy

R31538 cobalt belongs to the cobalt alloys classification, while K93050 alloy belongs to the iron alloys. There are 18 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is K93050 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 86
72
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
500 to 680

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1360
1430
Melting Onset (Solidus), °C 1290
1380
Specific Heat Capacity, J/kg-K 450
460
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.2
Embodied Carbon, kg CO2/kg material 8.1
4.7
Embodied Energy, MJ/kg 110
65
Embodied Water, L/kg 530
120

Common Calculations

Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 34 to 45
17 to 23
Strength to Weight: Bending, points 27 to 32
17 to 21
Thermal Shock Resistance, points 25 to 33
16 to 21

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.15
Chromium (Cr), % 26 to 30
0 to 0.25
Cobalt (Co), % 58.7 to 68.9
0 to 0.5
Iron (Fe), % 0 to 0.75
61.4 to 63.9
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
36
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0
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
0 to 0.020

Comparable Variants