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3105 Aluminum vs. C99700 Brass

3105 aluminum belongs to the aluminum alloys classification, while C99700 brass belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, 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 3105 aluminum and the bottom bar is C99700 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
120
Elongation at Break, % 1.1 to 20
25
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
46
Tensile Strength: Ultimate (UTS), MPa 120 to 240
380
Tensile Strength: Yield (Proof), MPa 46 to 220
170

Thermal Properties

Latent Heat of Fusion, J/g 400
200
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 660
900
Melting Onset (Solidus), °C 640
880
Specific Heat Capacity, J/kg-K 900
410
Thermal Expansion, µm/m-K 24
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 140
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
25
Density, g/cm3 2.8
8.1
Embodied Carbon, kg CO2/kg material 8.2
3.3
Embodied Energy, MJ/kg 150
53
Embodied Water, L/kg 1180
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
78
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
120
Stiffness to Weight: Axial, points 14
8.3
Stiffness to Weight: Bending, points 50
20
Strength to Weight: Axial, points 12 to 24
13
Strength to Weight: Bending, points 20 to 31
14
Thermal Shock Resistance, points 5.2 to 11
11

Alloy Composition

Aluminum (Al), % 96 to 99.5
0.5 to 3.0
Chromium (Cr), % 0 to 0.2
0
Copper (Cu), % 0 to 0.3
54 to 65.5
Iron (Fe), % 0 to 0.7
0 to 1.0
Lead (Pb), % 0
0 to 2.0
Magnesium (Mg), % 0.2 to 0.8
0
Manganese (Mn), % 0.3 to 0.8
11 to 15
Nickel (Ni), % 0
4.0 to 6.0
Silicon (Si), % 0 to 0.6
0
Tin (Sn), % 0
0 to 1.0
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.4
19 to 25
Residuals, % 0
0 to 0.3