C68800 Brass vs. ASTM B617 Coin Silver

C68800 brass belongs to the copper alloys classification, while ASTM B617 coin silver 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 C68800 brass and the bottom bar is ASTM B617 coin silver.

UNS C68800 Aluminum Brass ASTM B617 Coin Silver Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		110
Elastic (Young's, Tensile) Modulus, GPa		75

Elongation at Break, %		2.0 to 36
Elongation at Break, %		1.1 to 22

Poisson's Ratio		0.32
Poisson's Ratio		0.37

Shear Modulus, GPa		41
Shear Modulus, GPa		28

Shear Strength, MPa		380 to 510
Shear Strength, MPa		180 to 290

Tensile Strength: Ultimate (UTS), MPa		570 to 890
Tensile Strength: Ultimate (UTS), MPa		290 to 520

Thermal Properties

Latent Heat of Fusion, J/g		190
Latent Heat of Fusion, J/g		120

Melting Completion (Liquidus), °C		960
Melting Completion (Liquidus), °C		870

Melting Onset (Solidus), °C		950
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		400
Specific Heat Capacity, J/kg-K		250

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		18
Electrical Conductivity: Equal Volume, % IACS		83

Electrical Conductivity: Equal Weight (Specific), % IACS		20
Electrical Conductivity: Equal Weight (Specific), % IACS		72

Otherwise Unclassified Properties

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

Common Calculations

Stiffness to Weight: Axial, points		7.3
Stiffness to Weight: Axial, points		4.1

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

Strength to Weight: Axial, points		19 to 30
Strength to Weight: Axial, points		7.7 to 14

Strength to Weight: Bending, points		19 to 25
Strength to Weight: Bending, points		9.3 to 14

Thermal Shock Resistance, points		19 to 30
Thermal Shock Resistance, points		14 to 25

Alloy Composition

Aluminum (Al), %		3.0 to 3.8
Aluminum (Al), %		0 to 0.0050

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

Cobalt (Co), %		0.25 to 0.55
Cobalt (Co), %		0

Copper (Cu), %		70.8 to 75.5
Copper (Cu), %		9.0 to 10.4

Iron (Fe), %		0 to 0.2
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.050
Lead (Pb), %		0 to 0.030

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

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

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

Zinc (Zn), %		21.3 to 24.1
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.060