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4343 Aluminum vs. C68700 Brass

4343 aluminum belongs to the aluminum alloys classification, while C68700 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (5, 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 4343 aluminum and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
110
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Tensile Strength: Ultimate (UTS), MPa 110
390
Tensile Strength: Yield (Proof), MPa 62
140

Thermal Properties

Latent Heat of Fusion, J/g 510
190
Maximum Temperature: Mechanical, °C 160
160
Melting Completion (Liquidus), °C 620
970
Melting Onset (Solidus), °C 580
930
Specific Heat Capacity, J/kg-K 900
400
Thermal Conductivity, W/m-K 180
100
Thermal Expansion, µm/m-K 22
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
23
Electrical Conductivity: Equal Weight (Specific), % IACS 150
25

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
26
Density, g/cm3 2.6
8.3
Embodied Carbon, kg CO2/kg material 7.9
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1100
340

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 27
90
Stiffness to Weight: Axial, points 15
7.3
Stiffness to Weight: Bending, points 53
19
Strength to Weight: Axial, points 12
13
Strength to Weight: Bending, points 20
14
Thermal Diffusivity, mm2/s 77
30
Thermal Shock Resistance, points 5.2
13

Alloy Composition

Aluminum (Al), % 90.3 to 93.2
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Copper (Cu), % 0 to 0.25
76 to 79
Iron (Fe), % 0 to 0.8
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Manganese (Mn), % 0 to 0.1
0
Silicon (Si), % 6.8 to 8.2
0
Zinc (Zn), % 0 to 0.2
17.8 to 22.2
Residuals, % 0
0 to 0.5