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AWS BVAu-8 vs. R30001 Cobalt

AWS BVAu-8 belongs to the otherwise unclassified metals classification, while R30001 cobalt belongs to the cobalt alloys. There are 15 material properties with values for both materials. Properties with values for just one material (11, 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 AWS BVAu-8 and the bottom bar is R30001 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
220
Poisson's Ratio 0.42
0.28
Shear Modulus, GPa 36
86
Tensile Strength: Ultimate (UTS), MPa 140
620

Thermal Properties

Latent Heat of Fusion, J/g 71
310
Melting Completion (Liquidus), °C 1240
1530
Melting Onset (Solidus), °C 1200
1260
Specific Heat Capacity, J/kg-K 140
430
Thermal Expansion, µm/m-K 14
11

Otherwise Unclassified Properties

Density, g/cm3 19
9.0

Common Calculations

Stiffness to Weight: Axial, points 3.0
14
Stiffness to Weight: Bending, points 8.3
22
Strength to Weight: Axial, points 2.1
19
Strength to Weight: Bending, points 3.2
18
Thermal Shock Resistance, points 7.1
19

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
2.0 to 3.0
Chromium (Cr), % 0
28 to 32
Cobalt (Co), % 0
43 to 59
Gold (Au), % 91 to 93
0
Iron (Fe), % 0
0 to 3.0
Lead (Pb), % 0 to 0.0020
0
Molybdenum (Mo), % 0
0 to 1.0
Nickel (Ni), % 0
0 to 3.0
Palladium (Pd), % 7.0 to 9.0
0
Phosphorus (P), % 0 to 0.0020
0
Silicon (Si), % 0
0 to 2.0
Tungsten (W), % 0
11 to 13
Zinc (Zn), % 0 to 0.0010
0