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Zamak 7 vs. C27400 Brass

Zamak 7 belongs to the zinc alloys classification, while C27400 brass belongs to the copper alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is C27400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 86
110
Poisson's Ratio 0.25
0.31
Shear Modulus, GPa 33
40
Tensile Strength: Ultimate (UTS), MPa 280
370 to 650

Thermal Properties

Latent Heat of Fusion, J/g 120
170
Maximum Temperature: Mechanical, °C 95
120
Melting Completion (Liquidus), °C 390
920
Melting Onset (Solidus), °C 380
870
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
28
Electrical Conductivity: Equal Weight (Specific), % IACS 38
31

Otherwise Unclassified Properties

Base Metal Price, % relative 11
23
Density, g/cm3 6.4
8.0
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 57
45
Embodied Water, L/kg 380
320

Common Calculations

Stiffness to Weight: Axial, points 7.5
7.2
Stiffness to Weight: Bending, points 23
20
Strength to Weight: Axial, points 12
13 to 23
Strength to Weight: Bending, points 15
14 to 21
Thermal Diffusivity, mm2/s 43
37
Thermal Shock Resistance, points 8.6
12 to 22

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.25
61 to 64
Iron (Fe), % 0 to 0.075
0 to 0.1
Lead (Pb), % 0 to 0.0030
0 to 0.050
Magnesium (Mg), % 0.0050 to 0.020
0
Nickel (Ni), % 0.0050 to 0.020
0
Tin (Sn), % 0 to 0.0010
0
Zinc (Zn), % 95.3 to 96.5
35.6 to 39
Residuals, % 0
0 to 0.3