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AWS BAu-4 vs. Grade CY40 Nickel

AWS BAu-4 belongs to the otherwise unclassified metals classification, while grade CY40 nickel belongs to the nickel 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. 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 BAu-4 and the bottom bar is grade CY40 nickel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
190
Poisson's Ratio 0.4
0.29
Shear Modulus, GPa 41
74
Tensile Strength: Ultimate (UTS), MPa 200
540

Thermal Properties

Latent Heat of Fusion, J/g 100
330
Melting Completion (Liquidus), °C 950
1350
Melting Onset (Solidus), °C 950
1300
Specific Heat Capacity, J/kg-K 190
470
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Density, g/cm3 17
8.4

Common Calculations

Stiffness to Weight: Axial, points 3.6
13
Stiffness to Weight: Bending, points 9.3
23
Strength to Weight: Axial, points 3.2
18
Strength to Weight: Bending, points 4.4
18
Thermal Shock Resistance, points 9.2
16

Alloy Composition

Carbon (C), % 0
0 to 0.4
Chromium (Cr), % 0
14 to 17
Gold (Au), % 81.5 to 82.5
0
Iron (Fe), % 0
0 to 11
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 17.4 to 18.5
67 to 86
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 3.0
Sulfur (S), % 0
0 to 0.030
Residuals, % 0 to 0.15
0