Zamak 7 vs. ASTM B628 Ag-Cu

Zamak 7 belongs to the zinc alloys classification, while ASTM B628 Ag-Cu belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is ASTM B628 Ag-Cu.

Zamak 7 (ASTM AG40B, Z33523, Mazak 7) Zinc Alloy ASTM B628 Silver-Copper Eutectic Electrical Contact Alloy

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa		86
Elastic (Young's, Tensile) Modulus, GPa		83

Elongation at Break, %		13
Elongation at Break, %		1.1 to 17

Poisson's Ratio		0.25
Poisson's Ratio		0.36

Shear Modulus, GPa		33
Shear Modulus, GPa		31

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

Tensile Strength: Ultimate (UTS), MPa		280
Tensile Strength: Ultimate (UTS), MPa		350 to 760

Thermal Properties

Latent Heat of Fusion, J/g		120
Latent Heat of Fusion, J/g		140

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

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

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

Thermal Expansion, µm/m-K		27
Thermal Expansion, µm/m-K		19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS		27
Electrical Conductivity: Equal Volume, % IACS		84

Electrical Conductivity: Equal Weight (Specific), % IACS		38
Electrical Conductivity: Equal Weight (Specific), % IACS		75

Otherwise Unclassified Properties

Density, g/cm³		6.4
Density, g/cm³		10

Common Calculations

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

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

Strength to Weight: Axial, points		12
Strength to Weight: Axial, points		9.5 to 21

Strength to Weight: Bending, points		15
Strength to Weight: Bending, points		11 to 18

Thermal Shock Resistance, points		8.6
Thermal Shock Resistance, points		16 to 34

Alloy Composition

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

Cadmium (Cd), %		0 to 0.0020
Cadmium (Cd), %		0 to 0.050

Copper (Cu), %		0 to 0.25
Copper (Cu), %		26.6 to 29

Iron (Fe), %		0 to 0.075
Iron (Fe), %		0 to 0.050

Lead (Pb), %		0 to 0.0030
Lead (Pb), %		0 to 0.030

Magnesium (Mg), %		0.0050 to 0.020
Magnesium (Mg), %		0

Nickel (Ni), %		0.0050 to 0.020
Nickel (Ni), %		0 to 0.010

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

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

Tin (Sn), %		0 to 0.0010
Tin (Sn), %		0

Zinc (Zn), %		95.3 to 96.5
Zinc (Zn), %		0 to 0.060

Residuals, %		0
Residuals, %		0 to 0.21