ASTM B617 Coin Silver vs. C34500 Brass

ASTM B617 coin silver belongs to the otherwise unclassified metals classification, while C34500 brass belongs to the copper alloys. There are 19 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is ASTM B617 coin silver and the bottom bar is C34500 brass.

ASTM B617 Coin Silver Electrical Contact Alloy UNS C34500 Leaded Brass

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		75
Elastic (Young's, Tensile) Modulus, GPa		100

Elongation at Break, %		1.1 to 22
Elongation at Break, %		12 to 28

Poisson's Ratio		0.37
Poisson's Ratio		0.31

Shear Modulus, GPa		28
Shear Modulus, GPa		40

Shear Strength, MPa		180 to 290
Shear Strength, MPa		220 to 260

Tensile Strength: Ultimate (UTS), MPa		290 to 520
Tensile Strength: Ultimate (UTS), MPa		340 to 430

Thermal Properties

Latent Heat of Fusion, J/g		120
Latent Heat of Fusion, J/g		170

Melting Completion (Liquidus), °C		870
Melting Completion (Liquidus), °C		910

Melting Onset (Solidus), °C		780
Melting Onset (Solidus), °C		890

Specific Heat Capacity, J/kg-K		250
Specific Heat Capacity, J/kg-K		380

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		83
Electrical Conductivity: Equal Volume, % IACS		26

Electrical Conductivity: Equal Weight (Specific), % IACS		72
Electrical Conductivity: Equal Weight (Specific), % IACS		29

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		8.2

Common Calculations

Stiffness to Weight: Axial, points		4.1
Stiffness to Weight: Axial, points		7.1

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		19

Strength to Weight: Axial, points		7.7 to 14
Strength to Weight: Axial, points		12 to 15

Strength to Weight: Bending, points		9.3 to 14
Strength to Weight: Bending, points		13 to 16

Thermal Shock Resistance, points		14 to 25
Thermal Shock Resistance, points		11 to 14

Alloy Composition

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

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

Copper (Cu), %		9.0 to 10.4
Copper (Cu), %		62 to 65

Iron (Fe), %		0 to 0.050
Iron (Fe), %		0 to 0.15

Lead (Pb), %		0 to 0.030
Lead (Pb), %		1.5 to 2.5

Nickel (Ni), %		0 to 0.010
Nickel (Ni), %		0

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

Silver (Ag), %		89.6 to 91
Silver (Ag), %		0

Zinc (Zn), %		0 to 0.060
Zinc (Zn), %		32 to 36.5

Residuals, %		0
Residuals, %		0 to 0.4