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K94200 Alloy vs. R30012 Cobalt

K94200 alloy belongs to the iron alloys classification, while R30012 cobalt belongs to the cobalt 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 K94200 alloy and the bottom bar is R30012 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
220
Elongation at Break, % 5.0 to 32
1.0
Poisson's Ratio 0.34
0.28
Shear Modulus, GPa 54
86
Tensile Strength: Ultimate (UTS), MPa 500 to 710
830
Tensile Strength: Yield (Proof), MPa 270 to 650
650

Thermal Properties

Melting Onset (Solidus), °C 1440
1280
Specific Heat Capacity, J/kg-K 500
440
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 5.0
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
1.8

Otherwise Unclassified Properties

Density, g/cm3 8.2
8.8

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 35 to 130
7.7
Resilience: Unit (Modulus of Resilience), kJ/m3 250 to 1460
960
Stiffness to Weight: Axial, points 9.8
14
Stiffness to Weight: Bending, points 21
23
Strength to Weight: Axial, points 17 to 24
26
Strength to Weight: Bending, points 17 to 22
22
Thermal Diffusivity, mm2/s 3.7
3.8
Thermal Shock Resistance, points 49 to 70
23