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R31539 Cobalt vs. ASTM B563 Pd-Ag-Cu

R31539 cobalt belongs to the cobalt alloys classification, while ASTM B563 Pd-Ag-Cu belongs to the otherwise unclassified metals. There are 18 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is R31539 cobalt and the bottom bar is ASTM B563 Pd-Ag-Cu.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Elongation at Break, % 13 to 22
7.0 to 17
Poisson's Ratio 0.29
0.37
Shear Modulus, GPa 86
37
Tensile Strength: Ultimate (UTS), MPa 1000 to 1340
760 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 320
150
Melting Completion (Liquidus), °C 1360
1180
Melting Onset (Solidus), °C 1290
1030
Specific Heat Capacity, J/kg-K 450
260
Thermal Expansion, µm/m-K 13
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
5.6 to 6.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.1
4.6 to 5.5

Otherwise Unclassified Properties

Density, g/cm3 8.4
11

Common Calculations

Stiffness to Weight: Axial, points 15
5.2
Stiffness to Weight: Bending, points 24
14
Strength to Weight: Axial, points 33 to 44
19 to 30
Strength to Weight: Bending, points 27 to 32
17 to 22
Thermal Shock Resistance, points 24 to 32
39 to 61

Alloy Composition

Aluminum (Al), % 0.3 to 1.0
0
Carbon (C), % 0 to 0.14
0
Chromium (Cr), % 26 to 30
0
Cobalt (Co), % 57.7 to 68.7
0
Copper (Cu), % 0
15.5 to 16.5
Iron (Fe), % 0 to 0.75
0
Lanthanum (La), % 0.030 to 0.2
0
Manganese (Mn), % 0 to 1.0
0
Molybdenum (Mo), % 5.0 to 7.0
0
Nickel (Ni), % 0 to 1.0
0.8 to 1.2
Nitrogen (N), % 0 to 0.25
0
Palladium (Pd), % 0
43 to 45
Platinum (Pt), % 0
0.8 to 1.2
Silicon (Si), % 0 to 1.0
0
Silver (Ag), % 0
37 to 39
Residuals, % 0
0 to 0.4