AWS BVAu-7 vs. ASTM B685 Alloy

Both AWS BVAu-7 and ASTM B685 alloy are otherwise unclassified metals. They have a modest 25% 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 (3, in this case) are not shown.

For each property being compared, the top bar is AWS BVAu-7 and the bottom bar is ASTM B685 alloy.

AWS BVAu-7 (P00507) Vacuum Service Filler Metal ASTM B685 Palladium-Copper Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		130
Elastic (Young's, Tensile) Modulus, GPa		120

Poisson's Ratio		0.38
Poisson's Ratio		0.37

Shear Modulus, GPa		45
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		200
Tensile Strength: Ultimate (UTS), MPa		660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		180

Melting Completion (Liquidus), °C		1120
Melting Completion (Liquidus), °C		1230

Melting Onset (Solidus), °C		1100
Melting Onset (Solidus), °C		1200

Specific Heat Capacity, J/kg-K		240
Specific Heat Capacity, J/kg-K		300

Thermal Expansion, µm/m-K		13
Thermal Expansion, µm/m-K		14

Otherwise Unclassified Properties

Density, g/cm³		15
Density, g/cm³		11

Common Calculations

Stiffness to Weight: Axial, points		4.7
Stiffness to Weight: Axial, points		6.1

Stiffness to Weight: Bending, points		11
Stiffness to Weight: Bending, points		15

Strength to Weight: Axial, points		3.7
Strength to Weight: Axial, points		17 to 27

Strength to Weight: Bending, points		5.1
Strength to Weight: Bending, points		16 to 21

Thermal Shock Resistance, points		8.9
Thermal Shock Resistance, points		28 to 46

Alloy Composition

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Aluminum (Al), %		0
Aluminum (Al), %		0 to 0.0050

Cadmium (Cd), %		0 to 0.0010
Cadmium (Cd), %		0 to 0.050

Carbon (C), %		0 to 0.0050
Carbon (C), %		0

Cobalt (Co), %		0 to 0.060
Cobalt (Co), %		0

Copper (Cu), %		0
Copper (Cu), %		39.5 to 40.5

Gold (Au), %		49.5 to 50.5
Gold (Au), %		0

Iron (Fe), %		0
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.0020
Lead (Pb), %		0 to 0.030

Nickel (Ni), %		24.5 to 25.5
Nickel (Ni), %		0

Palladium (Pd), %		23.9 to 26
Palladium (Pd), %		59 to 60.5

Phosphorus (P), %		0 to 0.0020
Phosphorus (P), %		0

Silver (Ag), %		0
Silver (Ag), %		0 to 0.1

Zinc (Zn), %		0 to 0.0010
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.2