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2024 Aluminum vs. C21000 Brass

2024 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 (4, 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 2024 aluminum and the bottom bar is C21000 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Elongation at Break, % 4.0 to 16
2.9 to 50
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
43
Shear Strength, MPa 130 to 320
180 to 280
Tensile Strength: Ultimate (UTS), MPa 200 to 540
240 to 450
Tensile Strength: Yield (Proof), MPa 100 to 490
69 to 440

Thermal Properties

Latent Heat of Fusion, J/g 390
200
Maximum Temperature: Mechanical, °C 200
190
Melting Completion (Liquidus), °C 640
1070
Melting Onset (Solidus), °C 500
1050
Specific Heat Capacity, J/kg-K 880
390
Thermal Conductivity, W/m-K 120
230
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 30
56
Electrical Conductivity: Equal Weight (Specific), % IACS 90
57

Otherwise Unclassified Properties

Base Metal Price, % relative 11
30
Density, g/cm3 3.0
8.8
Embodied Carbon, kg CO2/kg material 8.3
2.6
Embodied Energy, MJ/kg 150
42
Embodied Water, L/kg 1140
310

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 68
13 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 70 to 1680
21 to 830
Stiffness to Weight: Axial, points 13
7.2
Stiffness to Weight: Bending, points 46
18
Strength to Weight: Axial, points 18 to 50
7.4 to 14
Strength to Weight: Bending, points 25 to 49
9.6 to 15
Thermal Diffusivity, mm2/s 46
69
Thermal Shock Resistance, points 8.6 to 24
8.1 to 15

Alloy Composition

Aluminum (Al), % 90.7 to 94.7
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.8 to 4.9
94 to 96
Iron (Fe), % 0 to 0.5
0 to 0.050
Lead (Pb), % 0
0 to 0.030
Magnesium (Mg), % 1.2 to 1.8
0
Manganese (Mn), % 0.3 to 0.9
0
Silicon (Si), % 0 to 0.5
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
3.7 to 6.0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0
0 to 0.2