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Commercially Pure Palladium vs. R30816 Cobalt

Commercially pure palladium belongs to the otherwise unclassified metals classification, while R30816 cobalt belongs to the cobalt alloys. There are 16 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is commercially pure palladium and the bottom bar is R30816 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
210
Elongation at Break, % 1.1 to 11
23
Poisson's Ratio 0.39
0.3
Shear Modulus, GPa 43
81
Tensile Strength: Ultimate (UTS), MPa 200 to 380
1020

Thermal Properties

Latent Heat of Fusion, J/g 160
300
Melting Completion (Liquidus), °C 1550
1540
Melting Onset (Solidus), °C 1550
1460
Specific Heat Capacity, J/kg-K 240
420
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Density, g/cm3 12
9.1

Common Calculations

Stiffness to Weight: Axial, points 5.6
13
Stiffness to Weight: Bending, points 14
22
Strength to Weight: Axial, points 4.5 to 8.8
31
Strength to Weight: Bending, points 6.2 to 9.7
25
Thermal Shock Resistance, points 9.8 to 19
28

Alloy Composition

Carbon (C), % 0
0.32 to 0.42
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
40 to 49.8
Iron (Fe), % 0
0 to 5.0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
3.5 to 4.5
Palladium (Pd), % 99.8 to 100
0
Phosphorus (P), % 0
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
3.5 to 4.5
Tungsten (W), % 0
3.5 to 4.5
Residuals, % 0 to 0.2
0