ZA-27 vs. ASTM B617 Coin Silver

ZA-27 belongs to the zinc 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 (17, in this case) are not shown.

For each property being compared, the top bar is ZA-27 and the bottom bar is ASTM B617 coin silver.

Zinc-Aluminum 27 (ZA-27, Z35841)ASTM B617 Coin Silver Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		78
Elastic (Young's, Tensile) Modulus, GPa		75

Elongation at Break, %		2.0 to 4.5
Elongation at Break, %		1.1 to 22

Poisson's Ratio		0.27
Poisson's Ratio		0.37

Shear Modulus, GPa		31
Shear Modulus, GPa		28

Shear Strength, MPa		230 to 330
Shear Strength, MPa		180 to 290

Tensile Strength: Ultimate (UTS), MPa		400 to 430
Tensile Strength: Ultimate (UTS), MPa		290 to 520

Thermal Properties

Latent Heat of Fusion, J/g		130
Latent Heat of Fusion, J/g		120

Melting Completion (Liquidus), °C		480
Melting Completion (Liquidus), °C		870

Melting Onset (Solidus), °C		380
Melting Onset (Solidus), °C		780

Specific Heat Capacity, J/kg-K		530
Specific Heat Capacity, J/kg-K		250

Thermal Expansion, µm/m-K		26
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		30
Electrical Conductivity: Equal Volume, % IACS		83

Electrical Conductivity: Equal Weight (Specific), % IACS		53
Electrical Conductivity: Equal Weight (Specific), % IACS		72

Otherwise Unclassified Properties

Density, g/cm³		5.0
Density, g/cm³		10

Common Calculations

Stiffness to Weight: Axial, points		8.6
Stiffness to Weight: Axial, points		4.1

Stiffness to Weight: Bending, points		28
Stiffness to Weight: Bending, points		14

Strength to Weight: Axial, points		22 to 24
Strength to Weight: Axial, points		7.7 to 14

Strength to Weight: Bending, points		24 to 25
Strength to Weight: Bending, points		9.3 to 14

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

Alloy Composition

Aluminum (Al), %		25 to 28
Aluminum (Al), %		0 to 0.0050

Cadmium (Cd), %		0 to 0.0060
Cadmium (Cd), %		0 to 0.050

Copper (Cu), %		2.0 to 2.5
Copper (Cu), %		9.0 to 10.4

Iron (Fe), %		0 to 0.1
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.0060
Lead (Pb), %		0 to 0.030

Magnesium (Mg), %		0.010 to 0.020
Magnesium (Mg), %		0

Nickel (Ni), %		0 to 0.020
Nickel (Ni), %		0 to 0.010

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

Silicon (Si), %		0 to 0.080
Silicon (Si), %		0

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

Tin (Sn), %		0 to 0.0030
Tin (Sn), %		0

Zinc (Zn), %		69.3 to 73
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.060