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Annealed ASTM B617 vs. Annealed R30605 Cobalt

Annealed ASTM B617 belongs to the otherwise unclassified metals classification, while annealed R30605 cobalt belongs to the cobalt alloys. There are 18 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is annealed ASTM B617 and the bottom bar is annealed R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 75
210
Elongation at Break, % 22
34
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 28
81
Tensile Strength: Ultimate (UTS), MPa 290
1130

Thermal Properties

Latent Heat of Fusion, J/g 120
290
Melting Completion (Liquidus), °C 870
1410
Melting Onset (Solidus), °C 780
1330
Specific Heat Capacity, J/kg-K 250
410
Thermal Expansion, µm/m-K 19
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 83
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 72
1.8

Otherwise Unclassified Properties

Density, g/cm3 10
9.6

Common Calculations

Stiffness to Weight: Axial, points 4.1
12
Stiffness to Weight: Bending, points 14
21
Strength to Weight: Axial, points 7.7
33
Strength to Weight: Bending, points 9.3
25
Thermal Shock Resistance, points 14
31

Alloy Composition


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Aluminum (Al), % 0 to 0.0050
0
Cadmium (Cd), % 0 to 0.050
0
Carbon (C), % 0
0.050 to 0.15
Chromium (Cr), % 0
19 to 21
Cobalt (Co), % 0
46.4 to 57
Copper (Cu), % 9.0 to 10.4
0
Iron (Fe), % 0 to 0.050
0 to 3.0
Lead (Pb), % 0 to 0.030
0
Manganese (Mn), % 0
1.0 to 2.0
Nickel (Ni), % 0 to 0.010
9.0 to 11
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0
0 to 0.4
Silver (Ag), % 89.6 to 91
0
Sulfur (S), % 0
0 to 0.030
Tungsten (W), % 0
14 to 16
Zinc (Zn), % 0 to 0.060
0
Residuals, % 0 to 0.060
0