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C87900 Brass vs. Zamak 7

C87900 brass belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. They have a modest 33% 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 C87900 brass and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
86
Elongation at Break, % 25
13
Poisson's Ratio 0.31
0.25
Shear Modulus, GPa 41
33
Tensile Strength: Ultimate (UTS), MPa 480
280
Tensile Strength: Yield (Proof), MPa 240
250

Thermal Properties

Latent Heat of Fusion, J/g 190
120
Maximum Temperature: Mechanical, °C 130
95
Melting Completion (Liquidus), °C 930
390
Melting Onset (Solidus), °C 900
380
Specific Heat Capacity, J/kg-K 390
410
Thermal Conductivity, W/m-K 120
110
Thermal Expansion, µm/m-K 20
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 15
27
Electrical Conductivity: Equal Weight (Specific), % IACS 17
38

Otherwise Unclassified Properties

Base Metal Price, % relative 24
11
Density, g/cm3 8.1
6.4
Embodied Carbon, kg CO2/kg material 2.7
3.0
Embodied Energy, MJ/kg 46
57
Embodied Water, L/kg 320
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
36
Resilience: Unit (Modulus of Resilience), kJ/m3 270
370
Stiffness to Weight: Axial, points 7.3
7.5
Stiffness to Weight: Bending, points 20
23
Strength to Weight: Axial, points 17
12
Strength to Weight: Bending, points 17
15
Thermal Diffusivity, mm2/s 37
43
Thermal Shock Resistance, points 16
8.6

Alloy Composition

Aluminum (Al), % 0 to 0.15
3.5 to 4.3
Antimony (Sb), % 0 to 0.050
0
Arsenic (As), % 0 to 0.050
0
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 63 to 69.2
0 to 0.25
Iron (Fe), % 0 to 0.4
0 to 0.075
Lead (Pb), % 0 to 0.25
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0 to 0.5
0.0050 to 0.020
Phosphorus (P), % 0 to 0.010
0
Silicon (Si), % 0.8 to 1.2
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0 to 0.25
0 to 0.0010
Zinc (Zn), % 30 to 36
95.3 to 96.5