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Zamak 7 vs. C85400 Brass

Zamak 7 belongs to the zinc alloys classification, while C85400 brass belongs to the copper alloys. They have a modest 28% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is Zamak 7 and the bottom bar is C85400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 80
55
Elastic (Young's, Tensile) Modulus, GPa 86
100
Elongation at Break, % 13
23
Poisson's Ratio 0.25
0.32
Shear Modulus, GPa 33
40
Tensile Strength: Ultimate (UTS), MPa 280
220
Tensile Strength: Yield (Proof), MPa 250
85

Thermal Properties

Latent Heat of Fusion, J/g 120
180
Maximum Temperature: Mechanical, °C 95
130
Melting Completion (Liquidus), °C 390
940
Melting Onset (Solidus), °C 380
940
Specific Heat Capacity, J/kg-K 410
380
Thermal Conductivity, W/m-K 110
89
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
25
Density, g/cm3 6.4
8.3
Embodied Carbon, kg CO2/kg material 3.0
2.8
Embodied Energy, MJ/kg 57
46
Embodied Water, L/kg 380
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 36
40
Resilience: Unit (Modulus of Resilience), kJ/m3 370
35
Stiffness to Weight: Axial, points 7.5
7.0
Stiffness to Weight: Bending, points 23
19
Strength to Weight: Axial, points 12
7.5
Strength to Weight: Bending, points 15
9.9
Thermal Diffusivity, mm2/s 43
28
Thermal Shock Resistance, points 8.6
7.6

Alloy Composition

Aluminum (Al), % 3.5 to 4.3
0 to 0.35
Cadmium (Cd), % 0 to 0.0020
0
Copper (Cu), % 0 to 0.25
65 to 70
Iron (Fe), % 0 to 0.075
0 to 0.7
Lead (Pb), % 0 to 0.0030
1.5 to 3.8
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
24 to 32
Residuals, % 0
0 to 1.1