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C34500 Brass vs. 4145 Aluminum

C34500 brass belongs to the copper alloys classification, while 4145 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, 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 C34500 brass and the bottom bar is 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 100
73
Elongation at Break, % 12 to 28
2.2
Poisson's Ratio 0.31
0.33
Shear Modulus, GPa 40
28
Shear Strength, MPa 220 to 260
69
Tensile Strength: Ultimate (UTS), MPa 340 to 430
120
Tensile Strength: Yield (Proof), MPa 120 to 180
68

Thermal Properties

Latent Heat of Fusion, J/g 170
540
Maximum Temperature: Mechanical, °C 120
160
Melting Completion (Liquidus), °C 910
590
Melting Onset (Solidus), °C 890
520
Specific Heat Capacity, J/kg-K 380
880
Thermal Conductivity, W/m-K 120
100
Thermal Expansion, µm/m-K 21
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 26
26
Electrical Conductivity: Equal Weight (Specific), % IACS 29
84

Otherwise Unclassified Properties

Base Metal Price, % relative 24
10
Density, g/cm3 8.2
2.8
Embodied Carbon, kg CO2/kg material 2.6
7.6
Embodied Energy, MJ/kg 45
140
Embodied Water, L/kg 320
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 42 to 75
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 160
31
Stiffness to Weight: Axial, points 7.1
14
Stiffness to Weight: Bending, points 19
50
Strength to Weight: Axial, points 12 to 15
12
Strength to Weight: Bending, points 13 to 16
19
Thermal Diffusivity, mm2/s 37
42
Thermal Shock Resistance, points 11 to 14
5.5

Alloy Composition

Aluminum (Al), % 0
83 to 87.4
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 62 to 65
3.3 to 4.7
Iron (Fe), % 0 to 0.15
0 to 0.8
Lead (Pb), % 1.5 to 2.5
0
Magnesium (Mg), % 0
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Silicon (Si), % 0
9.3 to 10.7
Zinc (Zn), % 32 to 36.5
0 to 0.2
Residuals, % 0
0 to 0.15