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7178 Aluminum vs. C49300 Brass

7178 aluminum belongs to the aluminum alloys classification, while C49300 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 C49300 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
100
Elongation at Break, % 4.5 to 12
4.5 to 20
Poisson's Ratio 0.32
0.31
Shear Modulus, GPa 27
40
Shear Strength, MPa 140 to 380
270 to 290
Tensile Strength: Ultimate (UTS), MPa 240 to 640
430 to 520
Tensile Strength: Yield (Proof), MPa 120 to 560
210 to 410

Thermal Properties

Latent Heat of Fusion, J/g 370
170
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 630
880
Melting Onset (Solidus), °C 480
840
Specific Heat Capacity, J/kg-K 860
380
Thermal Conductivity, W/m-K 130
88
Thermal Expansion, µm/m-K 23
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
15
Electrical Conductivity: Equal Weight (Specific), % IACS 91
17

Otherwise Unclassified Properties

Base Metal Price, % relative 10
26
Density, g/cm3 3.1
8.0
Embodied Carbon, kg CO2/kg material 8.2
3.0
Embodied Energy, MJ/kg 150
50
Embodied Water, L/kg 1110
370

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 52
21 to 71
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 2220
220 to 800
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 21 to 58
15 to 18
Strength to Weight: Bending, points 28 to 54
16 to 18
Thermal Diffusivity, mm2/s 47
29
Thermal Shock Resistance, points 10 to 28
14 to 18

Alloy Composition

Aluminum (Al), % 85.4 to 89.5
0 to 0.5
Antimony (Sb), % 0
0 to 0.5
Bismuth (Bi), % 0
0.5 to 2.0
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.6 to 2.4
58 to 62
Iron (Fe), % 0 to 0.5
0 to 0.1
Lead (Pb), % 0
0 to 0.010
Magnesium (Mg), % 2.4 to 3.1
0
Manganese (Mn), % 0 to 0.3
0 to 0.030
Nickel (Ni), % 0
0 to 1.5
Phosphorus (P), % 0
0 to 0.2
Selenium (Se), % 0
0 to 0.2
Silicon (Si), % 0 to 0.4
0 to 0.1
Tin (Sn), % 0
1.0 to 1.8
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 6.3 to 7.3
30.6 to 40.5
Residuals, % 0
0 to 0.5