C21000 Brass vs. ASTM B617 Coin Silver

C21000 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 C21000 brass and the bottom bar is ASTM B617 coin silver.

UNS C21000 (CW500L) Gilding 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, %		2.9 to 50
Elongation at Break, %		1.1 to 22

Poisson's Ratio		0.34
Poisson's Ratio		0.37

Shear Modulus, GPa		43
Shear Modulus, GPa		28

Shear Strength, MPa		180 to 280
Shear Strength, MPa		180 to 290

Tensile Strength: Ultimate (UTS), MPa		240 to 450
Tensile Strength: Ultimate (UTS), MPa		290 to 520

Thermal Properties

Latent Heat of Fusion, J/g		200
Latent Heat of Fusion, J/g		120

Melting Completion (Liquidus), °C		1070
Melting Completion (Liquidus), °C		870

Melting Onset (Solidus), °C		1050
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		390
Specific Heat Capacity, J/kg-K		250

Thermal Expansion, µm/m-K		18
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		56
Electrical Conductivity: Equal Volume, % IACS		83

Electrical Conductivity: Equal Weight (Specific), % IACS		57
Electrical Conductivity: Equal Weight (Specific), % IACS		72

Otherwise Unclassified Properties

Density, g/cm³		8.8
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		7.2
Stiffness to Weight: Axial, points		4.1

Stiffness to Weight: Bending, points		18
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		7.4 to 14
Strength to Weight: Axial, points		7.7 to 14

Strength to Weight: Bending, points		9.6 to 15
Strength to Weight: Bending, points		9.3 to 14

Thermal Shock Resistance, points		8.1 to 15
Thermal Shock Resistance, points		14 to 25

Alloy Composition

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

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

Copper (Cu), %		94 to 96
Copper (Cu), %		9.0 to 10.4

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

Lead (Pb), %		0 to 0.030
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), %		3.7 to 6.0
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.060