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C85200 Brass vs. Zamak 7

C85200 brass belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. They have a modest 24% 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 C85200 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, % 28
13
Poisson's Ratio 0.32
0.25
Shear Modulus, GPa 40
33
Tensile Strength: Ultimate (UTS), MPa 270
280
Tensile Strength: Yield (Proof), MPa 95
250

Thermal Properties

Latent Heat of Fusion, J/g 180
120
Maximum Temperature: Mechanical, °C 140
95
Melting Completion (Liquidus), °C 940
390
Melting Onset (Solidus), °C 930
380
Specific Heat Capacity, J/kg-K 380
410
Thermal Conductivity, W/m-K 84
110
Thermal Expansion, µm/m-K 20
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 18
27
Electrical Conductivity: Equal Weight (Specific), % IACS 19
38

Otherwise Unclassified Properties

Base Metal Price, % relative 26
11
Density, g/cm3 8.4
6.4
Embodied Carbon, kg CO2/kg material 2.8
3.0
Embodied Energy, MJ/kg 46
57
Embodied Water, L/kg 330
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 59
36
Resilience: Unit (Modulus of Resilience), kJ/m3 42
370
Stiffness to Weight: Axial, points 7.0
7.5
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 8.9
12
Strength to Weight: Bending, points 11
15
Thermal Diffusivity, mm2/s 27
43
Thermal Shock Resistance, points 9.3
8.6

Alloy Composition

Aluminum (Al), % 0 to 0.0050
3.5 to 4.3
Antimony (Sb), % 0 to 0.2
0
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 70 to 74
0 to 0.25
Iron (Fe), % 0 to 0.6
0 to 0.075
Lead (Pb), % 1.5 to 3.8
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Nickel (Ni), % 0 to 1.0
0.0050 to 0.020
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0 to 0.050
0
Sulfur (S), % 0 to 0.050
0
Tin (Sn), % 0.7 to 2.0
0 to 0.0010
Zinc (Zn), % 20 to 27
95.3 to 96.5
Residuals, % 0 to 0.9
0