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7178 Aluminum vs. C43000 Brass

7178 aluminum belongs to the aluminum alloys classification, while C43000 brass belongs to the copper alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, 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 C43000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.5 to 12
3.0 to 55
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 27
42
Shear Strength, MPa 140 to 380
230 to 410
Tensile Strength: Ultimate (UTS), MPa 240 to 640
320 to 710
Tensile Strength: Yield (Proof), MPa 120 to 560
130 to 550

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
1000
Specific Heat Capacity, J/kg-K 860
380
Thermal Conductivity, W/m-K 130
120
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
27
Electrical Conductivity: Equal Weight (Specific), % IACS 91
28

Otherwise Unclassified Properties

Base Metal Price, % relative 10
29
Density, g/cm3 3.1
8.6
Embodied Carbon, kg CO2/kg material 8.2
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1110
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
20 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
82 to 1350
Stiffness to Weight: Axial, points 13
7.1
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 21 to 58
10 to 23
Strength to Weight: Bending, points 28 to 54
12 to 20
Thermal Diffusivity, mm2/s 47
36
Thermal Shock Resistance, points 10 to 28
11 to 25

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 87
Iron (Fe), % 0 to 0.5
0 to 0.050
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0
Silicon (Si), % 0 to 0.4
0
Tin (Sn), % 0
1.7 to 2.7
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
9.7 to 14.3
Residuals, % 0
0 to 0.5