ASTM B685 Alloy vs. AWS BNi-8

ASTM B685 alloy belongs to the otherwise unclassified metals classification, while AWS BNi-8 belongs to the nickel alloys. There are 15 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is ASTM B685 alloy and the bottom bar is AWS BNi-8.

ASTM B685 Palladium-Copper Electrical Contact Alloy AWS BNi-8 (N99800) Filler Metal

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		120
Elastic (Young's, Tensile) Modulus, GPa		180

Poisson's Ratio		0.37
Poisson's Ratio		0.32

Shear Modulus, GPa		43
Shear Modulus, GPa		67

Tensile Strength: Ultimate (UTS), MPa		660 to 1060
Tensile Strength: Ultimate (UTS), MPa		570

Thermal Properties

Latent Heat of Fusion, J/g		180
Latent Heat of Fusion, J/g		390

Melting Completion (Liquidus), °C		1230
Melting Completion (Liquidus), °C		1010

Melting Onset (Solidus), °C		1200
Melting Onset (Solidus), °C		980

Specific Heat Capacity, J/kg-K		300
Specific Heat Capacity, J/kg-K		480

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

Otherwise Unclassified Properties

Density, g/cm³		11
Density, g/cm³		7.9

Common Calculations

Stiffness to Weight: Axial, points		6.1
Stiffness to Weight: Axial, points		12

Stiffness to Weight: Bending, points		15
Stiffness to Weight: Bending, points		24

Strength to Weight: Axial, points		17 to 27
Strength to Weight: Axial, points		20

Strength to Weight: Bending, points		16 to 21
Strength to Weight: Bending, points		19

Thermal Shock Resistance, points		28 to 46
Thermal Shock Resistance, points		17

Alloy Composition

Aluminum (Al), %		0 to 0.0050
Aluminum (Al), %		0 to 0.050

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

Carbon (C), %		0
Carbon (C), %		0 to 0.060

Cobalt (Co), %		0
Cobalt (Co), %		0 to 0.1

Copper (Cu), %		39.5 to 40.5
Copper (Cu), %		4.0 to 5.0

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

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

Manganese (Mn), %		0
Manganese (Mn), %		21.5 to 24.5

Nickel (Ni), %		0
Nickel (Ni), %		61.6 to 68.5

Palladium (Pd), %		59 to 60.5
Palladium (Pd), %		0

Phosphorus (P), %		0
Phosphorus (P), %		0 to 0.020

Selenium (Se), %		0
Selenium (Se), %		0 to 0.0050

Silicon (Si), %		0
Silicon (Si), %		6.0 to 8.0

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

Sulfur (S), %		0
Sulfur (S), %		0 to 0.020

Titanium (Ti), %		0
Titanium (Ti), %		0 to 0.050

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

Zirconium (Zr), %		0
Zirconium (Zr), %		0 to 0.050

Residuals, %		0
Residuals, %		0 to 0.5