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7049 Aluminum vs. C69430 Brass

7049 aluminum belongs to the aluminum alloys classification, while C69430 brass belongs to the copper 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 7049 aluminum and the bottom bar is C69430 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
110
Elongation at Break, % 6.2 to 7.0
17
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 27
42
Shear Strength, MPa 300 to 310
350
Tensile Strength: Ultimate (UTS), MPa 510 to 530
570
Tensile Strength: Yield (Proof), MPa 420 to 450
280

Thermal Properties

Latent Heat of Fusion, J/g 370
260
Maximum Temperature: Mechanical, °C 180
170
Melting Completion (Liquidus), °C 640
920
Melting Onset (Solidus), °C 480
820
Specific Heat Capacity, J/kg-K 860
410
Thermal Conductivity, W/m-K 130
26
Thermal Expansion, µm/m-K 23
18

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
6.2
Electrical Conductivity: Equal Weight (Specific), % IACS 110
6.7

Otherwise Unclassified Properties

Base Metal Price, % relative 10
27
Density, g/cm3 3.1
8.3
Embodied Carbon, kg CO2/kg material 8.1
2.7
Embodied Energy, MJ/kg 140
44
Embodied Water, L/kg 1110
300

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
80
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
340
Stiffness to Weight: Axial, points 13
7.4
Stiffness to Weight: Bending, points 45
19
Strength to Weight: Axial, points 46 to 47
19
Strength to Weight: Bending, points 46 to 47
18
Thermal Diffusivity, mm2/s 51
7.7
Thermal Shock Resistance, points 22 to 23
20

Alloy Composition

Aluminum (Al), % 85.7 to 89.5
0
Arsenic (As), % 0
0.030 to 0.060
Chromium (Cr), % 0.1 to 0.22
0
Copper (Cu), % 1.2 to 1.9
80 to 83
Iron (Fe), % 0 to 0.35
0 to 0.2
Lead (Pb), % 0
0 to 0.3
Magnesium (Mg), % 2.0 to 2.9
0
Manganese (Mn), % 0 to 0.2
0
Silicon (Si), % 0 to 0.25
3.5 to 4.5
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 7.2 to 8.2
11.4 to 16.5
Residuals, % 0
0 to 0.5