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C99400 Brass vs. 2124 Aluminum

C99400 brass belongs to the copper alloys classification, while 2124 aluminum belongs to the aluminum alloys. There are 24 material properties with values for both materials. Properties with values for just one material (6, 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 C99400 brass and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 120
71
Poisson's Ratio 0.34
0.33
Shear Modulus, GPa 44
27
Tensile Strength: Ultimate (UTS), MPa 460 to 550
490
Tensile Strength: Yield (Proof), MPa 230 to 370
430

Thermal Properties

Latent Heat of Fusion, J/g 230
390
Maximum Temperature: Mechanical, °C 200
190
Melting Completion (Liquidus), °C 1070
640
Melting Onset (Solidus), °C 1020
500
Specific Heat Capacity, J/kg-K 400
880
Thermal Expansion, µm/m-K 17
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 17
38
Electrical Conductivity: Equal Weight (Specific), % IACS 17
110

Otherwise Unclassified Properties

Base Metal Price, % relative 30
10
Density, g/cm3 8.7
3.0
Embodied Carbon, kg CO2/kg material 2.8
8.2
Embodied Energy, MJ/kg 45
150
Embodied Water, L/kg 310
1150

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 590
1290
Stiffness to Weight: Axial, points 7.5
13
Stiffness to Weight: Bending, points 19
46
Strength to Weight: Axial, points 15 to 17
45
Strength to Weight: Bending, points 15 to 17
46
Thermal Shock Resistance, points 16 to 19
21

Alloy Composition

Aluminum (Al), % 0.5 to 2.0
91.3 to 94.7
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 83.5 to 96.5
3.8 to 4.9
Iron (Fe), % 1.0 to 3.0
0 to 0.3
Lead (Pb), % 0 to 0.25
0
Magnesium (Mg), % 0
1.2 to 1.8
Manganese (Mn), % 0 to 0.5
0.3 to 0.9
Nickel (Ni), % 1.0 to 3.5
0
Silicon (Si), % 0.5 to 2.0
0 to 0.2
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0.5 to 5.0
0 to 0.25
Residuals, % 0
0 to 0.15