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Zamak 7 vs. CC755S Brass

Zamak 7 belongs to the zinc alloys classification, while CC755S 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 CC755S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
110
Elastic (Young's, Tensile) Modulus, GPa 86
100
Elongation at Break, % 13
9.5
Poisson's Ratio 0.25
0.31
Shear Modulus, GPa 33
40
Tensile Strength: Ultimate (UTS), MPa 280
390
Tensile Strength: Yield (Proof), MPa 250
250

Thermal Properties

Latent Heat of Fusion, J/g 120
170
Maximum Temperature: Mechanical, °C 95
120
Melting Completion (Liquidus), °C 390
820
Melting Onset (Solidus), °C 380
780
Specific Heat Capacity, J/kg-K 410
390
Thermal Conductivity, W/m-K 110
120
Thermal Expansion, µm/m-K 27
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
27
Electrical Conductivity: Equal Weight (Specific), % IACS 38
30

Otherwise Unclassified Properties

Base Metal Price, % relative 11
23
Density, g/cm3 6.4
8.1
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 57
46
Embodied Water, L/kg 380
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
33
Resilience: Unit (Modulus of Resilience), kJ/m3 370
290
Stiffness to Weight: Axial, points 7.5
7.1
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 12
14
Strength to Weight: Bending, points 15
15
Thermal Diffusivity, mm2/s 43
38
Thermal Shock Resistance, points 8.6
13

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0.4 to 0.7
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.25
59.5 to 61
Iron (Fe), % 0 to 0.075
0.050 to 0.2
Lead (Pb), % 0 to 0.0030
1.2 to 1.7
Magnesium (Mg), % 0.0050 to 0.020
0
Manganese (Mn), % 0
0 to 0.050
Nickel (Ni), % 0.0050 to 0.020
0 to 0.2
Silicon (Si), % 0
0 to 0.050
Tin (Sn), % 0 to 0.0010
0 to 0.3
Zinc (Zn), % 95.3 to 96.5
35.8 to 38.9