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7178 Aluminum vs. C23000 Brass

7178 aluminum belongs to the aluminum alloys classification, while C23000 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (4, 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 C23000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.5 to 12
2.9 to 47
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 27
42
Shear Strength, MPa 140 to 380
220 to 340
Tensile Strength: Ultimate (UTS), MPa 240 to 640
280 to 590
Tensile Strength: Yield (Proof), MPa 120 to 560
83 to 480

Thermal Properties

Latent Heat of Fusion, J/g 370
190
Maximum Temperature: Mechanical, °C 180
170
Melting Completion (Liquidus), °C 630
1030
Melting Onset (Solidus), °C 480
990
Specific Heat Capacity, J/kg-K 860
390
Thermal Conductivity, W/m-K 130
160
Thermal Expansion, µm/m-K 23
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
37
Electrical Conductivity: Equal Weight (Specific), % IACS 91
39

Otherwise Unclassified Properties

Base Metal Price, % relative 10
28
Density, g/cm3 3.1
8.6
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 150
43
Embodied Water, L/kg 1110
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
6.2 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
31 to 1040
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 21 to 58
8.9 to 19
Strength to Weight: Bending, points 28 to 54
11 to 18
Thermal Diffusivity, mm2/s 47
48
Thermal Shock Resistance, points 10 to 28
9.4 to 20

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
84 to 86
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
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
13.7 to 16
Residuals, % 0
0 to 0.2