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C69300 Brass vs. Zamak 7

C69300 brass belongs to the copper alloys classification, while Zamak 7 belongs to the zinc alloys. They have a modest 22% 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 (6, in this case) are not shown.

For each property being compared, the top bar is C69300 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, % 8.5 to 15
13
Poisson's Ratio 0.32
0.25
Shear Modulus, GPa 41
33
Shear Strength, MPa 330 to 370
210
Tensile Strength: Ultimate (UTS), MPa 550 to 630
280
Tensile Strength: Yield (Proof), MPa 300 to 390
250

Thermal Properties

Latent Heat of Fusion, J/g 240
120
Maximum Temperature: Mechanical, °C 160
95
Melting Completion (Liquidus), °C 880
390
Melting Onset (Solidus), °C 860
380
Specific Heat Capacity, J/kg-K 400
410
Thermal Conductivity, W/m-K 38
110
Thermal Expansion, µm/m-K 19
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.0
27
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
38

Otherwise Unclassified Properties

Base Metal Price, % relative 26
11
Density, g/cm3 8.2
6.4
Embodied Carbon, kg CO2/kg material 2.7
3.0
Embodied Energy, MJ/kg 45
57
Embodied Water, L/kg 310
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 47 to 70
36
Resilience: Unit (Modulus of Resilience), kJ/m3 400 to 700
370
Stiffness to Weight: Axial, points 7.4
7.5
Stiffness to Weight: Bending, points 19
23
Strength to Weight: Axial, points 19 to 21
12
Strength to Weight: Bending, points 18 to 20
15
Thermal Diffusivity, mm2/s 12
43
Thermal Shock Resistance, points 19 to 22
8.6

Alloy Composition

Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 73 to 77
0 to 0.25
Iron (Fe), % 0 to 0.1
0 to 0.075
Lead (Pb), % 0 to 0.090
0 to 0.0030
Magnesium (Mg), % 0
0.0050 to 0.020
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0 to 0.1
0.0050 to 0.020
Phosphorus (P), % 0.040 to 0.15
0
Silicon (Si), % 2.7 to 3.4
0
Tin (Sn), % 0 to 0.2
0 to 0.0010
Zinc (Zn), % 18.4 to 24.3
95.3 to 96.5
Residuals, % 0 to 0.5
0