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772.0 Aluminum vs. C68100 Brass

772.0 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 772.0 aluminum and the bottom bar is C68100 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
100
Elongation at Break, % 6.3 to 8.4
29
Poisson's Ratio 0.32
0.3
Shear Modulus, GPa 26
40
Tensile Strength: Ultimate (UTS), MPa 260 to 320
380
Tensile Strength: Yield (Proof), MPa 220 to 250
140

Thermal Properties

Latent Heat of Fusion, J/g 380
170
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 630
890
Melting Onset (Solidus), °C 580
870
Specific Heat Capacity, J/kg-K 870
390
Thermal Conductivity, W/m-K 150
98
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
24
Electrical Conductivity: Equal Weight (Specific), % IACS 110
27

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
23
Density, g/cm3 3.0
7.9
Embodied Carbon, kg CO2/kg material 8.0
2.8
Embodied Energy, MJ/kg 150
47
Embodied Water, L/kg 1140
330

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 16 to 25
86
Resilience: Unit (Modulus of Resilience), kJ/m3 350 to 430
94
Stiffness to Weight: Axial, points 13
7.3
Stiffness to Weight: Bending, points 46
20
Strength to Weight: Axial, points 25 to 31
13
Strength to Weight: Bending, points 31 to 36
15
Thermal Diffusivity, mm2/s 58
32
Thermal Shock Resistance, points 11 to 14
13

Alloy Composition

Aluminum (Al), % 91.2 to 93.2
0 to 0.010
Chromium (Cr), % 0.060 to 0.2
0
Copper (Cu), % 0 to 0.1
56 to 60
Iron (Fe), % 0 to 0.15
0.25 to 1.3
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 0.6 to 0.8
0
Manganese (Mn), % 0 to 0.1
0.010 to 0.5
Silicon (Si), % 0 to 0.15
0.040 to 0.15
Tin (Sn), % 0
0.75 to 1.1
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.0 to 7.0
36.4 to 43
Residuals, % 0
0 to 0.5