C81400 Copper vs. ASTM B540 Palladium

C81400 copper belongs to the copper alloys classification, while ASTM B540 palladium belongs to the otherwise unclassified metals. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C81400 copper and the bottom bar is ASTM B540 palladium.

UNS C81400 (Alloy 70C) Beryllium Copper ASTM B540 Palladium Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Elongation at Break, %		11
Elongation at Break, %		1.1 to 14

Poisson's Ratio		0.34
Poisson's Ratio		0.38

Shear Modulus, GPa		41
Shear Modulus, GPa		39

Tensile Strength: Ultimate (UTS), MPa		370
Tensile Strength: Ultimate (UTS), MPa		830 to 1240

Tensile Strength: Yield (Proof), MPa		250
Tensile Strength: Yield (Proof), MPa		620 to 1000

Thermal Properties

Latent Heat of Fusion, J/g		210
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		1090
Melting Completion (Liquidus), °C		1220

Melting Onset (Solidus), °C		1070
Melting Onset (Solidus), °C		1020

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		240

Thermal Expansion, µm/m-K		17
Thermal Expansion, µm/m-K		14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		60
Electrical Conductivity: Equal Volume, % IACS		4.9 to 5.5

Electrical Conductivity: Equal Weight (Specific), % IACS		61
Electrical Conductivity: Equal Weight (Specific), % IACS		3.5 to 3.9

Otherwise Unclassified Properties

Density, g/cm³		8.9
Density, g/cm³		13

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m³		36
Resilience: Ultimate (Unit Rupture Work), MJ/m³		13 to 100

Resilience: Unit (Modulus of Resilience), kJ/m³		260
Resilience: Unit (Modulus of Resilience), kJ/m³		1790 to 4660

Stiffness to Weight: Axial, points		7.3
Stiffness to Weight: Axial, points		4.7

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		12

Strength to Weight: Axial, points		11
Strength to Weight: Axial, points		18 to 27

Strength to Weight: Bending, points		13
Strength to Weight: Bending, points		15 to 20

Thermal Shock Resistance, points		13
Thermal Shock Resistance, points		41 to 61

Alloy Composition

Beryllium (Be), %		0.020 to 0.1
Beryllium (Be), %		0

Chromium (Cr), %		0.6 to 1.0
Chromium (Cr), %		0

Copper (Cu), %		98.4 to 99.38
Copper (Cu), %		13.5 to 14.5

Gold (Au), %		0
Gold (Au), %		9.5 to 10.5

Palladium (Pd), %		0
Palladium (Pd), %		34 to 36

Platinum (Pt), %		0
Platinum (Pt), %		9.5 to 10.5

Silver (Ag), %		0
Silver (Ag), %		29 to 31

Zinc (Zn), %		0
Zinc (Zn), %		0.8 to 1.2

Residuals, %		0
Residuals, %		0 to 0.3