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7108A Aluminum vs. C85700 Brass

7108A aluminum belongs to the aluminum alloys classification, while C85700 brass belongs to the copper alloys. There are 28 material properties with values for both materials. Properties with values for just one material (2, 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 7108A aluminum and the bottom bar is C85700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
100
Elongation at Break, % 11 to 13
17
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 350
310
Tensile Strength: Yield (Proof), MPa 290 to 300
110

Thermal Properties

Latent Heat of Fusion, J/g 380
170
Maximum Temperature: Mechanical, °C 210
120
Melting Completion (Liquidus), °C 630
940
Melting Onset (Solidus), °C 520
910
Specific Heat Capacity, J/kg-K 870
380
Thermal Conductivity, W/m-K 150
84
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
22
Electrical Conductivity: Equal Weight (Specific), % IACS 110
25

Otherwise Unclassified Properties

Base Metal Price, % relative 10
24
Density, g/cm3 2.9
8.0
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1150
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
41
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
59
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 47
20
Strength to Weight: Axial, points 33 to 34
11
Strength to Weight: Bending, points 38
13
Thermal Diffusivity, mm2/s 59
27
Thermal Shock Resistance, points 15 to 16
10

Alloy Composition

Aluminum (Al), % 91.6 to 94.4
0 to 0.8
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 0 to 0.050
58 to 64
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.7
Lead (Pb), % 0
0.8 to 1.5
Magnesium (Mg), % 0.7 to 1.5
0
Manganese (Mn), % 0 to 0.050
0
Nickel (Ni), % 0
0 to 1.0
Silicon (Si), % 0 to 0.2
0 to 0.050
Tin (Sn), % 0
0.5 to 1.5
Titanium (Ti), % 0 to 0.030
0
Zinc (Zn), % 4.8 to 5.8
32 to 40
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0
0 to 1.3