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K93500 Alloy vs. R30021 Cobalt

K93500 alloy belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt 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 K93500 alloy and the bottom bar is R30021 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
220
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 72
86
Tensile Strength: Ultimate (UTS), MPa 490 to 810
700

Thermal Properties

Latent Heat of Fusion, J/g 270
330
Melting Completion (Liquidus), °C 1430
1350
Melting Onset (Solidus), °C 1380
1190
Specific Heat Capacity, J/kg-K 460
450
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.4
Embodied Carbon, kg CO2/kg material 4.7
8.0
Embodied Energy, MJ/kg 65
110
Embodied Water, L/kg 130
520

Common Calculations

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

Alloy Composition

Aluminum (Al), % 0 to 0.1
0
Carbon (C), % 0 to 0.050
0.2 to 0.35
Chromium (Cr), % 0 to 0.25
26 to 29
Cobalt (Co), % 5.0
61.7 to 67.3
Iron (Fe), % 61.4 to 63
0 to 3.0
Magnesium (Mg), % 0 to 0.1
0
Manganese (Mn), % 0 to 0.6
0
Molybdenum (Mo), % 0
4.5 to 6.0
Nickel (Ni), % 32
2.0 to 3.0
Phosphorus (P), % 0 to 0.015
0
Silicon (Si), % 0 to 0.25
0 to 1.5
Sulfur (S), % 0 to 0.015
0
Titanium (Ti), % 0 to 0.1
0
Zirconium (Zr), % 0 to 0.1
0