C68700 Brass vs. ASTM B540 Palladium

C68700 brass belongs to the copper alloys classification, while ASTM B540 palladium belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is C68700 brass and the bottom bar is ASTM B540 palladium.

UNS C68700 (CW702R) Aluminum Brass ASTM B540 Palladium Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.32
Poisson's Ratio		0.38

Shear Modulus, GPa		41
Shear Modulus, GPa		39

Tensile Strength: Ultimate (UTS), MPa		390
Tensile Strength: Ultimate (UTS), MPa		830 to 1240

Tensile Strength: Yield (Proof), MPa		140
Tensile Strength: Yield (Proof), MPa		620 to 1000

Thermal Properties

Latent Heat of Fusion, J/g		190
Latent Heat of Fusion, J/g		140

Melting Completion (Liquidus), °C		970
Melting Completion (Liquidus), °C		1220

Melting Onset (Solidus), °C		930
Melting Onset (Solidus), °C		1020

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		240

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		23
Electrical Conductivity: Equal Volume, % IACS		4.9 to 5.5

Electrical Conductivity: Equal Weight (Specific), % IACS		25
Electrical Conductivity: Equal Weight (Specific), % IACS		3.5 to 3.9

Otherwise Unclassified Properties

Density, g/cm³		8.3
Density, g/cm³		13

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m³		90
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		19
Stiffness to Weight: Bending, points		12

Strength to Weight: Axial, points		13
Strength to Weight: Axial, points		18 to 27

Strength to Weight: Bending, points		14
Strength to Weight: Bending, points		15 to 20

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

Alloy Composition

Aluminum (Al), %		1.8 to 2.5
Aluminum (Al), %		0

Arsenic (As), %		0.020 to 0.1
Arsenic (As), %		0

Copper (Cu), %		76 to 79
Copper (Cu), %		13.5 to 14.5

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

Iron (Fe), %		0 to 0.060
Iron (Fe), %		0

Lead (Pb), %		0 to 0.070
Lead (Pb), %		0

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), %		17.8 to 22.2
Zinc (Zn), %		0.8 to 1.2

Residuals, %		0
Residuals, %		0 to 0.3