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7178 Aluminum vs. C66200 Brass

7178 aluminum belongs to the aluminum alloys classification, while C66200 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7178 aluminum and the bottom bar is C66200 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.5 to 12
8.0 to 15
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 27
42
Shear Strength, MPa 140 to 380
270 to 300
Tensile Strength: Ultimate (UTS), MPa 240 to 640
450 to 520
Tensile Strength: Yield (Proof), MPa 120 to 560
410 to 480

Thermal Properties

Latent Heat of Fusion, J/g 370
200
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 630
1070
Melting Onset (Solidus), °C 480
1030
Specific Heat Capacity, J/kg-K 860
390
Thermal Conductivity, W/m-K 130
150
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
35
Electrical Conductivity: Equal Weight (Specific), % IACS 91
36

Otherwise Unclassified Properties

Base Metal Price, % relative 10
29
Density, g/cm3 3.1
8.7
Embodied Carbon, kg CO2/kg material 8.2
2.7
Embodied Energy, MJ/kg 150
43
Embodied Water, L/kg 1110
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
40 to 66
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
760 to 1030
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 21 to 58
14 to 17
Strength to Weight: Bending, points 28 to 54
15 to 16
Thermal Diffusivity, mm2/s 47
45
Thermal Shock Resistance, points 10 to 28
16 to 18

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
86.6 to 91
Iron (Fe), % 0 to 0.5
0 to 0.050
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Nickel (Ni), % 0
0.3 to 1.0
Phosphorus (P), % 0
0.050 to 0.2
Silicon (Si), % 0 to 0.4
0
Tin (Sn), % 0
0.2 to 0.7
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
6.5 to 12.9
Residuals, % 0
0 to 0.5