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R30816 Cobalt vs. AWS BVAu-4

R30816 cobalt belongs to the cobalt alloys classification, while AWS BVAu-4 belongs to the otherwise unclassified metals. There are 15 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 R30816 cobalt and the bottom bar is AWS BVAu-4.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
110
Poisson's Ratio 0.3
0.4
Shear Modulus, GPa 81
41
Tensile Strength: Ultimate (UTS), MPa 1020
190

Thermal Properties

Latent Heat of Fusion, J/g 300
100
Melting Completion (Liquidus), °C 1540
950
Melting Onset (Solidus), °C 1460
950
Specific Heat Capacity, J/kg-K 420
190
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 9.1
17

Common Calculations

Stiffness to Weight: Axial, points 13
3.6
Stiffness to Weight: Bending, points 22
9.3
Strength to Weight: Axial, points 31
3.0
Strength to Weight: Bending, points 25
4.2
Thermal Shock Resistance, points 28
8.7

Alloy Composition

Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0.32 to 0.42
0 to 0.0050
Chromium (Cr), % 19 to 21
0
Cobalt (Co), % 40 to 49.8
0
Gold (Au), % 0
81.5 to 82.5
Iron (Fe), % 0 to 5.0
0
Lead (Pb), % 0
0 to 0.0020
Manganese (Mn), % 1.0 to 2.0
0
Molybdenum (Mo), % 3.5 to 4.5
0
Nickel (Ni), % 19 to 21
17.5 to 18.5
Niobium (Nb), % 3.5 to 4.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.0020
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Tantalum (Ta), % 3.5 to 4.5
0
Tungsten (W), % 3.5 to 4.5
0
Zinc (Zn), % 0
0 to 0.0010