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C24000 Brass vs. Zamak 7

C24000 brass belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is C24000 brass and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
86
Poisson's Ratio 0.32
0.25
Shear Modulus, GPa 42
33
Tensile Strength: Ultimate (UTS), MPa 310 to 640
280

Thermal Properties

Latent Heat of Fusion, J/g 190
120
Maximum Temperature: Mechanical, °C 160
95
Melting Completion (Liquidus), °C 1000
390
Melting Onset (Solidus), °C 970
380
Solidification (Pattern Maker's) Shrinkage, % 5.5
1.2
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 19
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
27
Electrical Conductivity: Equal Weight (Specific), % IACS 34
38

Otherwise Unclassified Properties

Base Metal Price, % relative 27
11
Density, g/cm3 8.5
6.4
Embodied Carbon, kg CO2/kg material 2.6
3.0
Embodied Energy, MJ/kg 43
57
Embodied Water, L/kg 320
380

Common Calculations

Stiffness to Weight: Axial, points 7.2
7.5
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 10 to 21
12
Strength to Weight: Bending, points 12 to 20
15
Thermal Diffusivity, mm2/s 43
43
Thermal Shock Resistance, points 10 to 22
8.6

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 78.5 to 81.5
0 to 0.25
Iron (Fe), % 0 to 0.050
0 to 0.075
Lead (Pb), % 0 to 0.050
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Nickel (Ni), % 0
0.0050 to 0.020
Tin (Sn), % 0
0 to 0.0010
Zinc (Zn), % 18.2 to 21.5
95.3 to 96.5
Residuals, % 0 to 0.2
0