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4004 Aluminum vs. C37100 Brass

4004 aluminum belongs to the aluminum alloys classification, while C37100 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 4004 aluminum and the bottom bar is C37100 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
100
Elongation at Break, % 2.4
8.0 to 40
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 27
40
Shear Strength, MPa 63
260 to 300
Tensile Strength: Ultimate (UTS), MPa 110
370 to 520
Tensile Strength: Yield (Proof), MPa 60
150 to 390

Thermal Properties

Latent Heat of Fusion, J/g 540
170
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 600
900
Melting Onset (Solidus), °C 560
890
Specific Heat Capacity, J/kg-K 910
380
Thermal Conductivity, W/m-K 130
120
Thermal Expansion, µm/m-K 22
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
27
Electrical Conductivity: Equal Weight (Specific), % IACS 120
30

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
23
Density, g/cm3 2.6
8.0
Embodied Carbon, kg CO2/kg material 8.0
2.7
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1070
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
38 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 25
110 to 750
Stiffness to Weight: Axial, points 15
7.2
Stiffness to Weight: Bending, points 54
20
Strength to Weight: Axial, points 12
13 to 18
Strength to Weight: Bending, points 20
14 to 18
Thermal Diffusivity, mm2/s 58
39
Thermal Shock Resistance, points 5.1
12 to 17

Alloy Composition

Aluminum (Al), % 86 to 90
0
Copper (Cu), % 0 to 0.25
58 to 62
Iron (Fe), % 0 to 0.8
0 to 0.15
Lead (Pb), % 0
0.6 to 1.2
Magnesium (Mg), % 1.0 to 2.0
0
Manganese (Mn), % 0 to 0.1
0
Silicon (Si), % 9.0 to 10.5
0
Zinc (Zn), % 0 to 0.2
36.3 to 41.4
Residuals, % 0
0 to 0.4