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Zamak 7 vs. C85800 Brass

Zamak 7 belongs to the zinc alloys classification, while C85800 brass belongs to the copper alloys. They have a modest 36% 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 (7, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is C85800 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 86
100
Elongation at Break, % 13
15
Poisson's Ratio 0.25
0.31
Shear Modulus, GPa 33
40
Tensile Strength: Ultimate (UTS), MPa 280
380
Tensile Strength: Yield (Proof), MPa 250
210

Thermal Properties

Latent Heat of Fusion, J/g 120
170
Maximum Temperature: Mechanical, °C 95
120
Melting Completion (Liquidus), °C 390
900
Melting Onset (Solidus), °C 380
870
Specific Heat Capacity, J/kg-K 410
380
Thermal Conductivity, W/m-K 110
84
Thermal Expansion, µm/m-K 27
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
20
Electrical Conductivity: Equal Weight (Specific), % IACS 38
22

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
48
Resilience: Unit (Modulus of Resilience), kJ/m3 370
210
Stiffness to Weight: Axial, points 7.5
7.2
Stiffness to Weight: Bending, points 23
20
Strength to Weight: Axial, points 12
13
Strength to Weight: Bending, points 15
15
Thermal Diffusivity, mm2/s 43
27
Thermal Shock Resistance, points 8.6
13

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0 to 0.55
Antimony (Sb), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.050
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.25
57 to 69
Iron (Fe), % 0 to 0.075
0 to 0.5
Lead (Pb), % 0 to 0.0030
0 to 1.5
Magnesium (Mg), % 0.0050 to 0.020
0
Manganese (Mn), % 0
0 to 0.25
Nickel (Ni), % 0.0050 to 0.020
0 to 0.5
Phosphorus (P), % 0
0 to 0.010
Silicon (Si), % 0
0 to 0.25
Sulfur (S), % 0
0 to 0.050
Tin (Sn), % 0 to 0.0010
0 to 1.5
Zinc (Zn), % 95.3 to 96.5
31 to 41
Residuals, % 0
0 to 1.3