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238.0 Aluminum vs. C68100 Brass

238.0 aluminum belongs to the aluminum alloys classification, while C68100 brass belongs to the copper alloys. There are 28 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 238.0 aluminum and the bottom bar is C68100 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 76
100
Elongation at Break, % 1.5
29
Poisson's Ratio 0.33
0.3
Shear Modulus, GPa 28
40
Tensile Strength: Ultimate (UTS), MPa 210
380
Tensile Strength: Yield (Proof), MPa 170
140

Thermal Properties

Latent Heat of Fusion, J/g 430
170
Maximum Temperature: Mechanical, °C 170
120
Melting Completion (Liquidus), °C 600
890
Melting Onset (Solidus), °C 510
870
Specific Heat Capacity, J/kg-K 840
390
Thermal Conductivity, W/m-K 100
98
Thermal Expansion, µm/m-K 21
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
24
Electrical Conductivity: Equal Weight (Specific), % IACS 67
27

Otherwise Unclassified Properties

Base Metal Price, % relative 12
23
Density, g/cm3 3.4
7.9
Embodied Carbon, kg CO2/kg material 7.4
2.8
Embodied Energy, MJ/kg 140
47
Embodied Water, L/kg 1040
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.9
86
Resilience: Unit (Modulus of Resilience), kJ/m3 180
94
Stiffness to Weight: Axial, points 12
7.3
Stiffness to Weight: Bending, points 42
20
Strength to Weight: Axial, points 17
13
Strength to Weight: Bending, points 23
15
Thermal Diffusivity, mm2/s 37
32
Thermal Shock Resistance, points 9.1
13

Alloy Composition

Aluminum (Al), % 81.9 to 84.9
0 to 0.010
Copper (Cu), % 9.5 to 10.5
56 to 60
Iron (Fe), % 1.0 to 1.5
0.25 to 1.3
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0 to 0.25
0
Manganese (Mn), % 0
0.010 to 0.5
Silicon (Si), % 3.6 to 4.4
0.040 to 0.15
Tin (Sn), % 0
0.75 to 1.1
Zinc (Zn), % 1.0 to 1.5
36.4 to 43
Residuals, % 0
0 to 0.5