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Commercially Pure Silver vs. R30075 Cobalt

Commercially pure silver belongs to the otherwise unclassified metals classification, while R30075 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is commercially pure silver and the bottom bar is R30075 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210 to 250
Elongation at Break, % 1.1 to 29
12
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 26
82 to 98
Tensile Strength: Ultimate (UTS), MPa 190 to 340
780 to 1280

Thermal Properties

Latent Heat of Fusion, J/g 110
320
Melting Completion (Liquidus), °C 960
1360
Melting Onset (Solidus), °C 960
1290
Specific Heat Capacity, J/kg-K 240
450
Thermal Conductivity, W/m-K 420
13
Thermal Expansion, µm/m-K 20
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 100
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 87
2.1

Otherwise Unclassified Properties

Density, g/cm3 10
8.4

Common Calculations

Stiffness to Weight: Axial, points 3.8
14 to 17
Stiffness to Weight: Bending, points 13
24 to 25
Strength to Weight: Axial, points 4.9 to 8.9
26 to 42
Strength to Weight: Bending, points 6.9 to 10
22 to 31
Thermal Diffusivity, mm2/s 170
3.5
Thermal Shock Resistance, points 9.5 to 17
21 to 29

Alloy Composition


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Aluminum (Al), % 0
0 to 0.1
Boron (B), % 0
0 to 0.010
Carbon (C), % 0
0 to 0.35
Chromium (Cr), % 0
27 to 30
Cobalt (Co), % 0
58.7 to 68
Iron (Fe), % 0
0 to 0.75
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0
0 to 0.020
Silicon (Si), % 0
0 to 1.0
Silver (Ag), % 99.9 to 100
0
Sulfur (S), % 0
0 to 0.010
Titanium (Ti), % 0
0 to 0.1
Tungsten (W), % 0
0 to 0.2
Residuals, % 0 to 0.1
0

Comparable Variants