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Commercially Pure Silver vs. R30003 Cobalt

Commercially pure silver belongs to the otherwise unclassified metals classification, while R30003 cobalt belongs to the cobalt alloys. There are 20 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is commercially pure silver and the bottom bar is R30003 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
210
Elongation at Break, % 1.1 to 29
10 to 73
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 26
83
Tensile Strength: Ultimate (UTS), MPa 190 to 340
970 to 1720

Thermal Properties

Latent Heat of Fusion, J/g 110
310
Melting Completion (Liquidus), °C 960
1400
Melting Onset (Solidus), °C 960
1440
Specific Heat Capacity, J/kg-K 240
450
Thermal Conductivity, W/m-K 420
13
Thermal Expansion, µm/m-K 20
13

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
Stiffness to Weight: Bending, points 13
24
Strength to Weight: Axial, points 4.9 to 8.9
32 to 57
Strength to Weight: Bending, points 6.9 to 10
26 to 38
Thermal Diffusivity, mm2/s 170
3.3
Thermal Shock Resistance, points 9.5 to 17
26 to 45

Alloy Composition


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Boron (B), % 0
0 to 0.1
Carbon (C), % 0
0 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
39 to 41
Iron (Fe), % 0
10 to 20.5
Manganese (Mn), % 0
1.5 to 2.5
Molybdenum (Mo), % 0
6.0 to 8.0
Nickel (Ni), % 0
14 to 16
Phosphorus (P), % 0
0 to 0.015
Silicon (Si), % 0
0 to 1.2
Silver (Ag), % 99.9 to 100
0
Sulfur (S), % 0
0 to 0.015
Residuals, % 0 to 0.1
0

Comparable Variants