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C68400 Brass vs. Zamak 7

C68400 brass belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is C68400 brass and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
80
Elastic (Young's, Tensile) Modulus, GPa 110
86
Elongation at Break, % 18
13
Poisson's Ratio 0.31
0.25
Shear Modulus, GPa 41
33
Shear Strength, MPa 330
210
Tensile Strength: Ultimate (UTS), MPa 540
280
Tensile Strength: Yield (Proof), MPa 310
250

Thermal Properties

Latent Heat of Fusion, J/g 210
120
Maximum Temperature: Mechanical, °C 130
95
Melting Completion (Liquidus), °C 840
390
Melting Onset (Solidus), °C 820
380
Specific Heat Capacity, J/kg-K 400
410
Thermal Conductivity, W/m-K 66
110
Thermal Expansion, µm/m-K 20
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 87
27
Electrical Conductivity: Equal Weight (Specific), % IACS 99
38

Otherwise Unclassified Properties

Base Metal Price, % relative 23
11
Density, g/cm3 7.9
6.4
Embodied Carbon, kg CO2/kg material 2.7
3.0
Embodied Energy, MJ/kg 47
57
Embodied Water, L/kg 320
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 81
36
Resilience: Unit (Modulus of Resilience), kJ/m3 460
370
Stiffness to Weight: Axial, points 7.5
7.5
Stiffness to Weight: Bending, points 20
23
Strength to Weight: Axial, points 19
12
Strength to Weight: Bending, points 19
15
Thermal Diffusivity, mm2/s 21
43
Thermal Shock Resistance, points 18
8.6

Alloy Composition


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Aluminum (Al), % 0 to 0.5
3.5 to 4.3
Boron (B), % 0.0010 to 0.030
0
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 59 to 64
0 to 0.25
Iron (Fe), % 0 to 1.0
0 to 0.075
Lead (Pb), % 0 to 0.090
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Manganese (Mn), % 0.2 to 1.5
0
Nickel (Ni), % 0 to 0.5
0.0050 to 0.020
Phosphorus (P), % 0.030 to 0.3
0
Silicon (Si), % 1.5 to 2.5
0
Tin (Sn), % 0 to 0.5
0 to 0.0010
Zinc (Zn), % 28.6 to 39.3
95.3 to 96.5
Residuals, % 0 to 0.5
0