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7108 Aluminum vs. C21000 Brass

7108 aluminum belongs to the aluminum alloys classification, while C21000 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 7108 aluminum and the bottom bar is C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
110
Elongation at Break, % 11
2.9 to 50
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 26
43
Shear Strength, MPa 210
180 to 280
Tensile Strength: Ultimate (UTS), MPa 350
240 to 450
Tensile Strength: Yield (Proof), MPa 290
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 380
200
Maximum Temperature: Mechanical, °C 210
190
Melting Completion (Liquidus), °C 630
1070
Melting Onset (Solidus), °C 530
1050
Specific Heat Capacity, J/kg-K 880
390
Thermal Conductivity, W/m-K 150
230
Thermal Expansion, µm/m-K 24
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
56
Electrical Conductivity: Equal Weight (Specific), % IACS 120
57

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
30
Density, g/cm3 2.9
8.8
Embodied Carbon, kg CO2/kg material 8.3
2.6
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1150
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 620
21 to 830
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 47
18
Strength to Weight: Axial, points 34
7.4 to 14
Strength to Weight: Bending, points 38
9.6 to 15
Thermal Diffusivity, mm2/s 59
69
Thermal Shock Resistance, points 16
8.1 to 15

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
0
Copper (Cu), % 0 to 0.050
94 to 96
Iron (Fe), % 0 to 0.1
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 0.7 to 1.4
0
Manganese (Mn), % 0 to 0.050
0
Silicon (Si), % 0 to 0.1
0
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 4.5 to 5.5
3.7 to 6.0
Zirconium (Zr), % 0.12 to 0.25
0
Residuals, % 0
0 to 0.2