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AWS BAu-5 vs. R30155 Cobalt

AWS BAu-5 belongs to the otherwise unclassified metals classification, while R30155 cobalt belongs to the iron alloys. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. 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 BAu-5 and the bottom bar is R30155 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
210
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 50
81
Tensile Strength: Ultimate (UTS), MPa 210
850

Thermal Properties

Latent Heat of Fusion, J/g 180
300
Melting Completion (Liquidus), °C 1170
1470
Melting Onset (Solidus), °C 1140
1420
Specific Heat Capacity, J/kg-K 280
450
Thermal Expansion, µm/m-K 12
14

Otherwise Unclassified Properties

Density, g/cm3 13
8.5

Common Calculations

Stiffness to Weight: Axial, points 5.8
14
Stiffness to Weight: Bending, points 13
23
Strength to Weight: Axial, points 4.5
28
Strength to Weight: Bending, points 6.0
24
Thermal Shock Resistance, points 9.0
21

Alloy Composition

Carbon (C), % 0
0.080 to 0.16
Chromium (Cr), % 0
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Gold (Au), % 29.5 to 30.5
0
Iron (Fe), % 0
24.3 to 36.2
Manganese (Mn), % 0
1.0 to 2.0
Molybdenum (Mo), % 0
2.5 to 3.5
Nickel (Ni), % 35.5 to 36.4
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0 to 0.2
Palladium (Pd), % 33.5 to 34.5
0
Phosphorus (P), % 0
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
Residuals, % 0 to 0.15
0