C86700 Bronze vs. ASTM B685 Alloy

C86700 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 (11, in this case) are not shown.

For each property being compared, the top bar is C86700 bronze and the bottom bar is ASTM B685 alloy.

UNS C86700 Leaded Manganese 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		0.31
Poisson's Ratio		0.37

Shear Modulus, GPa		41
Shear Modulus, GPa		43

Tensile Strength: Ultimate (UTS), MPa		630
Tensile Strength: Ultimate (UTS), MPa		660 to 1060

Thermal Properties

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

Melting Completion (Liquidus), °C		880
Melting Completion (Liquidus), °C		1230

Melting Onset (Solidus), °C		860
Melting Onset (Solidus), °C		1200

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		300

Thermal Expansion, µm/m-K		20
Thermal Expansion, µm/m-K		14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		17
Electrical Conductivity: Equal Volume, % IACS		5.0

Electrical Conductivity: Equal Weight (Specific), % IACS		19
Electrical Conductivity: Equal Weight (Specific), % IACS		4.1

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points		7.5
Stiffness to Weight: Axial, points		6.1

Stiffness to Weight: Bending, points		20
Stiffness to Weight: Bending, points		15

Strength to Weight: Axial, points		22
Strength to Weight: Axial, points		17 to 27

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

Thermal Shock Resistance, points		21
Thermal Shock Resistance, points		28 to 46

Alloy Composition

Aluminum (Al), %		1.0 to 3.0
Aluminum (Al), %		0 to 0.0050

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

Copper (Cu), %		55 to 60
Copper (Cu), %		39.5 to 40.5

Iron (Fe), %		1.0 to 3.0
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0.5 to 1.5
Lead (Pb), %		0 to 0.030

Manganese (Mn), %		1.0 to 3.5
Manganese (Mn), %		0

Nickel (Ni), %		0 to 1.0
Nickel (Ni), %		0

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

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

Tin (Sn), %		0 to 1.5
Tin (Sn), %		0

Zinc (Zn), %		30 to 38
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.2