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Zamak 7 vs. ASTM B780 Alloy

Zamak 7 belongs to the zinc alloys classification, while ASTM B780 alloy belongs to the otherwise unclassified metals. There are 17 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 Zamak 7 and the bottom bar is ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 86
83
Elongation at Break, % 13
1.1 to 9.1
Poisson's Ratio 0.25
0.36
Shear Modulus, GPa 33
30
Shear Strength, MPa 210
200 to 340
Tensile Strength: Ultimate (UTS), MPa 280
330 to 590

Thermal Properties

Latent Heat of Fusion, J/g 120
140
Specific Heat Capacity, J/kg-K 410
270
Thermal Expansion, µm/m-K 27
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
70 to 76
Electrical Conductivity: Equal Weight (Specific), % IACS 38
62 to 68

Otherwise Unclassified Properties

Density, g/cm3 6.4
10

Common Calculations

Stiffness to Weight: Axial, points 7.5
4.5
Stiffness to Weight: Bending, points 23
14
Strength to Weight: Axial, points 12
9.1 to 16
Strength to Weight: Bending, points 15
11 to 15
Thermal Shock Resistance, points 8.6
16 to 29

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0
Cadmium (Cd), % 0 to 0.0020
0 to 0.050
Copper (Cu), % 0 to 0.25
23.5 to 25.7
Iron (Fe), % 0 to 0.075
0 to 0.050
Lead (Pb), % 0 to 0.0030
0 to 0.030
Magnesium (Mg), % 0.0050 to 0.020
0
Nickel (Ni), % 0.0050 to 0.020
0.35 to 0.65
Silver (Ag), % 0
74 to 76
Tin (Sn), % 0 to 0.0010
0
Zinc (Zn), % 95.3 to 96.5
0 to 0.060