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Zamak 7 vs. CC764S Brass

Zamak 7 belongs to the zinc alloys classification, while CC764S brass belongs to the copper alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is CC764S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
160
Elastic (Young's, Tensile) Modulus, GPa 86
110
Elongation at Break, % 13
15
Poisson's Ratio 0.25
0.31
Shear Modulus, GPa 33
41
Tensile Strength: Ultimate (UTS), MPa 280
680
Tensile Strength: Yield (Proof), MPa 250
290

Thermal Properties

Latent Heat of Fusion, J/g 120
180
Maximum Temperature: Mechanical, °C 95
130
Melting Completion (Liquidus), °C 390
850
Melting Onset (Solidus), °C 380
810
Specific Heat Capacity, J/kg-K 410
400
Thermal Conductivity, W/m-K 110
94
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
32
Electrical Conductivity: Equal Weight (Specific), % IACS 38
36

Otherwise Unclassified Properties

Base Metal Price, % relative 11
23
Density, g/cm3 6.4
7.9
Embodied Carbon, kg CO2/kg material 3.0
2.9
Embodied Energy, MJ/kg 57
49
Embodied Water, L/kg 380
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
80
Resilience: Unit (Modulus of Resilience), kJ/m3 370
390
Stiffness to Weight: Axial, points 7.5
7.6
Stiffness to Weight: Bending, points 23
20
Strength to Weight: Axial, points 12
24
Strength to Weight: Bending, points 15
22
Thermal Diffusivity, mm2/s 43
30
Thermal Shock Resistance, points 8.6
22

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
1.0 to 3.0
Antimony (Sb), % 0
0 to 0.050
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.25
52 to 66
Iron (Fe), % 0 to 0.075
0.5 to 2.5
Lead (Pb), % 0 to 0.0030
0 to 0.3
Magnesium (Mg), % 0.0050 to 0.020
0
Manganese (Mn), % 0
0.3 to 4.0
Nickel (Ni), % 0.0050 to 0.020
0 to 3.0
Phosphorus (P), % 0
0 to 0.030
Silicon (Si), % 0
0 to 0.1
Tin (Sn), % 0 to 0.0010
0 to 0.3
Zinc (Zn), % 95.3 to 96.5
20.7 to 50.2