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C68800 Brass vs. Zamak 5

C68800 brass belongs to the copper alloys classification, while Zamak 5 belongs to the zinc alloys. They have a modest 27% 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 (6, in this case) are not shown.

For each property being compared, the top bar is C68800 brass and the bottom bar is Zamak 5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
87
Elongation at Break, % 2.0 to 36
6.3
Poisson's Ratio 0.32
0.25
Rockwell B Hardness 81 to 99
57
Shear Modulus, GPa 41
33
Shear Strength, MPa 380 to 510
260
Tensile Strength: Ultimate (UTS), MPa 570 to 890
330
Tensile Strength: Yield (Proof), MPa 390 to 790
240

Thermal Properties

Latent Heat of Fusion, J/g 190
120
Maximum Temperature: Mechanical, °C 160
95
Melting Completion (Liquidus), °C 960
390
Melting Onset (Solidus), °C 950
380
Specific Heat Capacity, J/kg-K 400
410
Thermal Conductivity, W/m-K 40
110
Thermal Expansion, µm/m-K 19
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
26
Electrical Conductivity: Equal Weight (Specific), % IACS 20
37

Otherwise Unclassified Properties

Base Metal Price, % relative 26
12
Density, g/cm3 8.2
6.4
Embodied Carbon, kg CO2/kg material 2.8
3.0
Embodied Energy, MJ/kg 48
57
Embodied Water, L/kg 350
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 180
19
Resilience: Unit (Modulus of Resilience), kJ/m3 710 to 2860
330
Stiffness to Weight: Axial, points 7.3
7.5
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 19 to 30
14
Strength to Weight: Bending, points 19 to 25
16
Thermal Diffusivity, mm2/s 12
42
Thermal Shock Resistance, points 19 to 30
9.9

Alloy Composition

Aluminum (Al), % 3.0 to 3.8
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0050
Cobalt (Co), % 0.25 to 0.55
0
Copper (Cu), % 70.8 to 75.5
0.7 to 1.3
Iron (Fe), % 0 to 0.2
0 to 0.1
Lead (Pb), % 0 to 0.050
0 to 0.0050
Magnesium (Mg), % 0
0.025 to 0.080
Nickel (Ni), % 0
0 to 0.020
Silicon (Si), % 0
0 to 0.030
Tin (Sn), % 0
0 to 0.0030
Zinc (Zn), % 21.3 to 24.1
94.3 to 95.7
Residuals, % 0 to 0.5
0