ASTM B628 Ag-Cu vs. Zamak 2

ASTM B628 Ag-Cu belongs to the otherwise unclassified metals classification, while Zamak 2 belongs to the zinc alloys. There are 19 material properties with values for both materials. Properties with values for just one material (16, in this case) are not shown.

For each property being compared, the top bar is ASTM B628 Ag-Cu and the bottom bar is Zamak 2.

ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy Zamak 2 (ASTM AC43A, Z35541, Mazak 2) Zinc Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		83
Elastic (Young's, Tensile) Modulus, GPa		87

Elongation at Break, %		1.1 to 17
Elongation at Break, %		6.0

Poisson's Ratio		0.36
Poisson's Ratio		0.26

Shear Modulus, GPa		31
Shear Modulus, GPa		33

Shear Strength, MPa		210 to 430
Shear Strength, MPa		320

Tensile Strength: Ultimate (UTS), MPa		350 to 760
Tensile Strength: Ultimate (UTS), MPa		360

Thermal Properties

Latent Heat of Fusion, J/g		140
Latent Heat of Fusion, J/g		130

Melting Completion (Liquidus), °C		780
Melting Completion (Liquidus), °C		390

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

Specific Heat Capacity, J/kg-K		280
Specific Heat Capacity, J/kg-K		410

Thermal Expansion, µm/m-K		19
Thermal Expansion, µm/m-K		28

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		84
Electrical Conductivity: Equal Volume, % IACS		25

Electrical Conductivity: Equal Weight (Specific), % IACS		75
Electrical Conductivity: Equal Weight (Specific), % IACS		35

Otherwise Unclassified Properties

Density, g/cm³		10
Density, g/cm³		6.5

Common Calculations

Stiffness to Weight: Axial, points		4.6
Stiffness to Weight: Axial, points		7.5

Stiffness to Weight: Bending, points		14
Stiffness to Weight: Bending, points		23

Strength to Weight: Axial, points		9.5 to 21
Strength to Weight: Axial, points		15

Strength to Weight: Bending, points		11 to 18
Strength to Weight: Bending, points		17

Thermal Shock Resistance, points		16 to 34
Thermal Shock Resistance, points		11

Alloy Composition

Aluminum (Al), %		0 to 0.0050
Aluminum (Al), %		3.5 to 4.3

Cadmium (Cd), %		0 to 0.050
Cadmium (Cd), %		0 to 0.0050

Copper (Cu), %		26.6 to 29
Copper (Cu), %		2.5 to 3.3

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

Lead (Pb), %		0 to 0.030
Lead (Pb), %		0 to 0.0050

Magnesium (Mg), %		0
Magnesium (Mg), %		0.020 to 0.060

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

Phosphorus (P), %		0 to 0.030
Phosphorus (P), %		0

Silicon (Si), %		0
Silicon (Si), %		0 to 0.030

Silver (Ag), %		71 to 73
Silver (Ag), %		0

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

Zinc (Zn), %		0 to 0.060
Zinc (Zn), %		92.2 to 94

Residuals, %		0 to 0.21
Residuals, %		0