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4145 Aluminum vs. CC752S Brass

4145 aluminum belongs to the aluminum alloys classification, while CC752S brass belongs to the copper alloys. There are 28 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 4145 aluminum and the bottom bar is CC752S brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
100
Elongation at Break, % 2.2
8.4
Poisson's Ratio 0.33
0.31
Shear Modulus, GPa 28
40
Tensile Strength: Ultimate (UTS), MPa 120
350
Tensile Strength: Yield (Proof), MPa 68
190

Thermal Properties

Latent Heat of Fusion, J/g 540
170
Maximum Temperature: Mechanical, °C 160
130
Melting Completion (Liquidus), °C 590
840
Melting Onset (Solidus), °C 520
800
Specific Heat Capacity, J/kg-K 880
380
Thermal Conductivity, W/m-K 100
110
Thermal Expansion, µm/m-K 21
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
25
Electrical Conductivity: Equal Weight (Specific), % IACS 84
28

Otherwise Unclassified Properties

Base Metal Price, % relative 10
24
Density, g/cm3 2.8
8.1
Embodied Carbon, kg CO2/kg material 7.6
2.7
Embodied Energy, MJ/kg 140
46
Embodied Water, L/kg 1040
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.3
25
Resilience: Unit (Modulus of Resilience), kJ/m3 31
180
Stiffness to Weight: Axial, points 14
7.1
Stiffness to Weight: Bending, points 50
19
Strength to Weight: Axial, points 12
12
Strength to Weight: Bending, points 19
13
Thermal Diffusivity, mm2/s 42
35
Thermal Shock Resistance, points 5.5
12

Alloy Composition

Aluminum (Al), % 83 to 87.4
0.3 to 0.7
Antimony (Sb), % 0
0 to 0.14
Arsenic (As), % 0
0.040 to 0.14
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 3.3 to 4.7
61.5 to 64.5
Iron (Fe), % 0 to 0.8
0 to 0.3
Lead (Pb), % 0
1.5 to 2.2
Magnesium (Mg), % 0 to 0.15
0
Manganese (Mn), % 0 to 0.15
0 to 0.1
Nickel (Ni), % 0
0 to 0.2
Silicon (Si), % 9.3 to 10.7
0 to 0.020
Tin (Sn), % 0
0 to 0.3
Zinc (Zn), % 0 to 0.2
31.5 to 36.7
Residuals, % 0 to 0.15
0