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AWS BAu-5 vs. R31539 Cobalt

AWS BAu-5 belongs to the otherwise unclassified metals classification, while R31539 cobalt belongs to the cobalt alloys. There are 15 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is AWS BAu-5 and the bottom bar is R31539 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 140
220
Poisson's Ratio 0.37
0.29
Shear Modulus, GPa 50
86
Tensile Strength: Ultimate (UTS), MPa 210
1000 to 1340

Thermal Properties

Latent Heat of Fusion, J/g 180
320
Melting Completion (Liquidus), °C 1170
1360
Melting Onset (Solidus), °C 1140
1290
Specific Heat Capacity, J/kg-K 280
450
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Density, g/cm3 13
8.4

Common Calculations

Stiffness to Weight: Axial, points 5.8
15
Stiffness to Weight: Bending, points 13
24
Strength to Weight: Axial, points 4.5
33 to 44
Strength to Weight: Bending, points 6.0
27 to 32
Thermal Shock Resistance, points 9.0
24 to 32

Alloy Composition


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Aluminum (Al), % 0
0.3 to 1.0
Carbon (C), % 0
0 to 0.14
Chromium (Cr), % 0
26 to 30
Cobalt (Co), % 0
57.7 to 68.7
Gold (Au), % 29.5 to 30.5
0
Iron (Fe), % 0
0 to 0.75
Lanthanum (La), % 0
0.030 to 0.2
Manganese (Mn), % 0
0 to 1.0
Molybdenum (Mo), % 0
5.0 to 7.0
Nickel (Ni), % 35.5 to 36.4
0 to 1.0
Nitrogen (N), % 0
0 to 0.25
Palladium (Pd), % 33.5 to 34.5
0
Silicon (Si), % 0
0 to 1.0
Residuals, % 0 to 0.15
0