AWS BAu-3 vs. C72800 Copper-nickel

AWS BAu-3 belongs to the otherwise unclassified metals classification, while C72800 copper-nickel belongs to the copper alloys. They have 65% of their average alloy composition in common. There are 15 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is AWS BAu-3 and the bottom bar is C72800 copper-nickel.

AWS BAu-3 (P00350) Filler Metal UNS C72800 Tin-Bearing Copper-Nickel

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		120

Poisson's Ratio		0.37
Poisson's Ratio		0.34

Shear Modulus, GPa		41
Shear Modulus, GPa		44

Tensile Strength: Ultimate (UTS), MPa		220
Tensile Strength: Ultimate (UTS), MPa		520 to 1270

Thermal Properties

Latent Heat of Fusion, J/g		160
Latent Heat of Fusion, J/g		210

Melting Completion (Liquidus), °C		1030
Melting Completion (Liquidus), °C		1080

Melting Onset (Solidus), °C		970
Melting Onset (Solidus), °C		920

Specific Heat Capacity, J/kg-K		300
Specific Heat Capacity, J/kg-K		380

Thermal Expansion, µm/m-K		16
Thermal Expansion, µm/m-K		17

Otherwise Unclassified Properties

Density, g/cm³		13
Density, g/cm³		8.8

Common Calculations

Stiffness to Weight: Axial, points		5.0
Stiffness to Weight: Axial, points		7.4

Stiffness to Weight: Bending, points		13
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		4.9
Strength to Weight: Axial, points		17 to 40

Strength to Weight: Bending, points		6.4
Strength to Weight: Bending, points		16 to 30

Thermal Shock Resistance, points		8.7
Thermal Shock Resistance, points		19 to 45

Alloy Composition

Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.1

Antimony (Sb), %		0
Antimony (Sb), %		0 to 0.020

Bismuth (Bi), %		0
Bismuth (Bi), %		0 to 0.0010

Boron (B), %		0
Boron (B), %		0 to 0.0010

Copper (Cu), %		60.9 to 63
Copper (Cu), %		78.3 to 82.8

Gold (Au), %		34.5 to 35.5
Gold (Au), %		0

Iron (Fe), %		0
Iron (Fe), %		0 to 0.5

Lead (Pb), %		0
Lead (Pb), %		0 to 0.0050

Magnesium (Mg), %		0
Magnesium (Mg), %		0.0050 to 0.15

Manganese (Mn), %		0
Manganese (Mn), %		0.050 to 0.3

Nickel (Ni), %		2.5 to 3.5
Nickel (Ni), %		9.5 to 10.5

Niobium (Nb), %		0
Niobium (Nb), %		0.1 to 0.3

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.0050

Silicon (Si), %		0
Silicon (Si), %		0 to 0.050

Sulfur (S), %		0
Sulfur (S), %		0 to 0.0025

Tin (Sn), %		0
Tin (Sn), %		7.5 to 8.5

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.010

Zinc (Zn), %		0
Zinc (Zn), %		0 to 1.0

Residuals, %		0
Residuals, %		0 to 0.3