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AWS BVAu-2 vs. R30155 Cobalt

AWS BVAu-2 belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. There are 15 material properties with values for both materials. Properties with values for just one material (18, in this case) are not shown.

For each property being compared, the top bar is AWS BVAu-2 and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
210
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 36
81
Tensile Strength: Ultimate (UTS), MPa 150
850

Thermal Properties

Latent Heat of Fusion, J/g 92
300
Melting Completion (Liquidus), °C 890
1470
Melting Onset (Solidus), °C 890
1420
Specific Heat Capacity, J/kg-K 180
450
Thermal Expansion, µm/m-K 15
14

Otherwise Unclassified Properties

Density, g/cm3 17
8.5

Common Calculations

Stiffness to Weight: Axial, points 3.3
14
Stiffness to Weight: Bending, points 9.1
23
Strength to Weight: Axial, points 2.4
28
Strength to Weight: Bending, points 3.6
24
Thermal Shock Resistance, points 7.1
21

Alloy Composition

Cadmium (Cd), % 0 to 0.0010
0
Carbon (C), % 0 to 0.0050
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 19.5 to 20.5
0
Gold (Au), % 79.5 to 80.5
0
Iron (Fe), % 0
24.3 to 36.2
Lead (Pb), % 0 to 0.0020
0
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 0
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Phosphorus (P), % 0 to 0.0020
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0
0 to 0.030
Tantalum (Ta), % 0
0.75 to 1.3
Tungsten (W), % 0
2.0 to 3.0
Zinc (Zn), % 0 to 0.0010
0