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R30006 Cobalt vs. AWS BVAu-8

R30006 cobalt belongs to the cobalt alloys classification, while AWS BVAu-8 belongs to the otherwise unclassified metals. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is R30006 cobalt and the bottom bar is AWS BVAu-8.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 220
100
Poisson's Ratio 0.28
0.42
Shear Modulus, GPa 85
36
Tensile Strength: Ultimate (UTS), MPa 900
140

Thermal Properties

Latent Heat of Fusion, J/g 320
71
Melting Completion (Liquidus), °C 1400
1240
Melting Onset (Solidus), °C 1290
1200
Specific Heat Capacity, J/kg-K 450
140
Thermal Expansion, µm/m-K 11
14

Otherwise Unclassified Properties

Density, g/cm3 8.6
19

Common Calculations

Stiffness to Weight: Axial, points 14
3.0
Stiffness to Weight: Bending, points 23
8.3
Strength to Weight: Axial, points 29
2.1
Strength to Weight: Bending, points 24
3.2
Thermal Shock Resistance, points 26
7.1

Alloy Composition

Cadmium (Cd), % 0
0 to 0.0010
Carbon (C), % 0.9 to 1.4
0 to 0.0050
Chromium (Cr), % 27 to 32
0
Cobalt (Co), % 48.6 to 68.1
0
Gold (Au), % 0
91 to 93
Iron (Fe), % 0 to 3.0
0
Lead (Pb), % 0
0 to 0.0020
Molybdenum (Mo), % 0 to 1.0
0
Nickel (Ni), % 0 to 3.0
0
Palladium (Pd), % 0
7.0 to 9.0
Phosphorus (P), % 0
0 to 0.0020
Silicon (Si), % 0 to 2.0
0
Tungsten (W), % 4.0 to 6.0
0
Zinc (Zn), % 0
0 to 0.0010