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R31538 Cobalt vs. R05240 Alloy

R31538 cobalt belongs to the cobalt alloys classification, while R05240 alloy belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is R31538 cobalt and the bottom bar is R05240 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
150
Elongation at Break, % 13 to 23
25
Poisson's Ratio 0.29
0.36
Shear Modulus, GPa 86
57
Tensile Strength: Ultimate (UTS), MPa 1020 to 1360
270
Tensile Strength: Yield (Proof), MPa 580 to 930
170

Thermal Properties

Latent Heat of Fusion, J/g 320
210
Specific Heat Capacity, J/kg-K 450
190
Thermal Expansion, µm/m-K 13
6.8

Otherwise Unclassified Properties

Density, g/cm3 8.4
14
Embodied Water, L/kg 530
460

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 200
59
Resilience: Unit (Modulus of Resilience), kJ/m3 750 to 1920
90
Stiffness to Weight: Axial, points 15
6.3
Stiffness to Weight: Bending, points 24
13
Strength to Weight: Axial, points 34 to 45
5.4
Strength to Weight: Bending, points 27 to 32
6.8
Thermal Shock Resistance, points 25 to 33
18

Alloy Composition

Carbon (C), % 0.15 to 0.35
0 to 0.010
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 58.7 to 68.9
0
Hydrogen (H), % 0
0 to 0.0015
Iron (Fe), % 0 to 0.75
0 to 0.010
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0 to 0.020
Nickel (Ni), % 0 to 1.0
0 to 0.010
Niobium (Nb), % 0
35 to 42
Nitrogen (N), % 0 to 0.25
0 to 0.010
Oxygen (O), % 0
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.0050
Tantalum (Ta), % 0
57.9 to 65
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 0
0 to 0.050