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R31539 Cobalt vs. K94200 Alloy

R31539 cobalt belongs to the cobalt alloys classification, while K94200 alloy belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is K94200 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
140
Elongation at Break, % 13 to 22
5.0 to 32
Poisson's Ratio 0.29
0.34
Shear Modulus, GPa 86
54
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
500 to 710
Tensile Strength: Yield (Proof), MPa 590 to 940
270 to 650

Thermal Properties

Melting Onset (Solidus), °C 1290
1440
Specific Heat Capacity, J/kg-K 450
500
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 13
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
3.0

Otherwise Unclassified Properties

Density, g/cm3 8.4
8.2

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 190
35 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 780 to 2000
250 to 1460
Stiffness to Weight: Axial, points 15
9.8
Stiffness to Weight: Bending, points 24
21
Strength to Weight: Axial, points 33 to 44
17 to 24
Strength to Weight: Bending, points 27 to 32
17 to 22
Thermal Diffusivity, mm2/s 3.5
3.7
Thermal Shock Resistance, points 24 to 32
49 to 70

Comparable Variants