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A242.0 Aluminum vs. C68700 Brass

A242.0 aluminum belongs to the aluminum alloys classification, while C68700 brass belongs to the copper alloys. There are 24 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 A242.0 aluminum and the bottom bar is C68700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
110
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 27
41
Tensile Strength: Ultimate (UTS), MPa 220
390

Thermal Properties

Latent Heat of Fusion, J/g 390
190
Maximum Temperature: Mechanical, °C 210
160
Melting Completion (Liquidus), °C 680
970
Melting Onset (Solidus), °C 550
930
Specific Heat Capacity, J/kg-K 870
400
Thermal Conductivity, W/m-K 140
100
Thermal Expansion, µm/m-K 23
19

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 37
23
Electrical Conductivity: Equal Weight (Specific), % IACS 110
25

Otherwise Unclassified Properties

Base Metal Price, % relative 12
26
Density, g/cm3 3.1
8.3
Embodied Carbon, kg CO2/kg material 8.3
2.8
Embodied Energy, MJ/kg 150
46
Embodied Water, L/kg 1130
340

Common Calculations

Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 20
13
Strength to Weight: Bending, points 26
14
Thermal Diffusivity, mm2/s 52
30
Thermal Shock Resistance, points 9.3
13

Alloy Composition

Aluminum (Al), % 89.3 to 93.1
1.8 to 2.5
Arsenic (As), % 0
0.020 to 0.1
Chromium (Cr), % 0.15 to 0.25
0
Copper (Cu), % 3.7 to 4.5
76 to 79
Iron (Fe), % 0 to 0.8
0 to 0.060
Lead (Pb), % 0
0 to 0.070
Magnesium (Mg), % 1.2 to 1.7
0
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 1.8 to 2.3
0
Silicon (Si), % 0 to 0.6
0
Titanium (Ti), % 0.070 to 0.2
0
Zinc (Zn), % 0 to 0.1
17.8 to 22.2
Residuals, % 0
0 to 0.5