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Zamak 7 vs. C85700 Brass

Zamak 7 belongs to the zinc alloys classification, while C85700 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 28 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 Zamak 7 and the bottom bar is C85700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 86
100
Elongation at Break, % 13
17
Poisson's Ratio 0.25
0.31
Shear Modulus, GPa 33
40
Tensile Strength: Ultimate (UTS), MPa 280
310
Tensile Strength: Yield (Proof), MPa 250
110

Thermal Properties

Latent Heat of Fusion, J/g 120
170
Maximum Temperature: Mechanical, °C 95
120
Melting Completion (Liquidus), °C 390
940
Melting Onset (Solidus), °C 380
910
Specific Heat Capacity, J/kg-K 410
380
Thermal Conductivity, W/m-K 110
84
Thermal Expansion, µm/m-K 27
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
22
Electrical Conductivity: Equal Weight (Specific), % IACS 38
25

Otherwise Unclassified Properties

Base Metal Price, % relative 11
24
Density, g/cm3 6.4
8.0
Embodied Carbon, kg CO2/kg material 3.0
2.8
Embodied Energy, MJ/kg 57
47
Embodied Water, L/kg 380
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
41
Resilience: Unit (Modulus of Resilience), kJ/m3 370
59
Stiffness to Weight: Axial, points 7.5
7.2
Stiffness to Weight: Bending, points 23
20
Strength to Weight: Axial, points 12
11
Strength to Weight: Bending, points 15
13
Thermal Diffusivity, mm2/s 43
27
Thermal Shock Resistance, points 8.6
10

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0 to 0.8
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.25
58 to 64
Iron (Fe), % 0 to 0.075
0 to 0.7
Lead (Pb), % 0 to 0.0030
0.8 to 1.5
Magnesium (Mg), % 0.0050 to 0.020
0
Nickel (Ni), % 0.0050 to 0.020
0 to 1.0
Silicon (Si), % 0
0 to 0.050
Tin (Sn), % 0 to 0.0010
0.5 to 1.5
Zinc (Zn), % 95.3 to 96.5
32 to 40
Residuals, % 0
0 to 1.3