C53800 Bronze vs. ASTM B685 Alloy

C53800 bronze belongs to the copper alloys classification, while ASTM B685 alloy belongs to the otherwise unclassified metals. They have 40% of their average alloy composition in common. There are 17 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 C53800 bronze and the bottom bar is ASTM B685 alloy.

UNS C53800 Leaded Phosphor Bronze ASTM B685 Palladium-Copper Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

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

Poisson's Ratio		0.34
Poisson's Ratio		0.37

Shear Modulus, GPa		40
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		830
Tensile Strength: Ultimate (UTS), MPa		660 to 1060

Thermal Properties

Latent Heat of Fusion, J/g		190
Latent Heat of Fusion, J/g		180

Melting Completion (Liquidus), °C		980
Melting Completion (Liquidus), °C		1230

Melting Onset (Solidus), °C		800
Melting Onset (Solidus), °C		1200

Specific Heat Capacity, J/kg-K		360
Specific Heat Capacity, J/kg-K		300

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		9.0
Electrical Conductivity: Equal Volume, % IACS		5.0

Electrical Conductivity: Equal Weight (Specific), % IACS		9.3
Electrical Conductivity: Equal Weight (Specific), % IACS		4.1

Otherwise Unclassified Properties

Density, g/cm³		8.7
Density, g/cm³		11

Common Calculations

Stiffness to Weight: Axial, points		6.8
Stiffness to Weight: Axial, points		6.1

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		15

Strength to Weight: Axial, points		26
Strength to Weight: Axial, points		17 to 27

Strength to Weight: Bending, points		22
Strength to Weight: Bending, points		16 to 21

Thermal Shock Resistance, points		31
Thermal Shock Resistance, points		28 to 46

Alloy Composition

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

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

Copper (Cu), %		85.1 to 86.5
Copper (Cu), %		39.5 to 40.5

Iron (Fe), %		0 to 0.030
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0.4 to 0.6
Lead (Pb), %		0 to 0.030

Manganese (Mn), %		0 to 0.060
Manganese (Mn), %		0

Nickel (Ni), %		0 to 0.030
Nickel (Ni), %		0

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

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

Tin (Sn), %		13.1 to 13.9
Tin (Sn), %		0

Zinc (Zn), %		0 to 0.12
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.2