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EN AC-21100 Aluminum vs. C99400 Brass

EN AC-21100 aluminum belongs to the aluminum alloys classification, while C99400 brass belongs to the copper alloys. There are 24 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 EN AC-21100 aluminum and the bottom bar is C99400 brass.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 71
120
Poisson's Ratio 0.33
0.34
Shear Modulus, GPa 27
44
Tensile Strength: Ultimate (UTS), MPa 340 to 350
460 to 550
Tensile Strength: Yield (Proof), MPa 210 to 240
230 to 370

Thermal Properties

Latent Heat of Fusion, J/g 390
230
Maximum Temperature: Mechanical, °C 170
200
Melting Completion (Liquidus), °C 670
1070
Melting Onset (Solidus), °C 550
1020
Specific Heat Capacity, J/kg-K 880
400
Thermal Expansion, µm/m-K 23
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 34
17
Electrical Conductivity: Equal Weight (Specific), % IACS 100
17

Otherwise Unclassified Properties

Base Metal Price, % relative 11
30
Density, g/cm3 3.0
8.7
Embodied Carbon, kg CO2/kg material 8.0
2.8
Embodied Energy, MJ/kg 150
45
Embodied Water, L/kg 1150
310

Common Calculations

Resilience: Unit (Modulus of Resilience), kJ/m3 300 to 400
230 to 590
Stiffness to Weight: Axial, points 13
7.5
Stiffness to Weight: Bending, points 46
19
Strength to Weight: Axial, points 31 to 33
15 to 17
Strength to Weight: Bending, points 36 to 37
15 to 17
Thermal Shock Resistance, points 15
16 to 19

Alloy Composition


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Aluminum (Al), % 93.4 to 95.7
0.5 to 2.0
Copper (Cu), % 4.2 to 5.2
83.5 to 96.5
Iron (Fe), % 0 to 0.19
1.0 to 3.0
Lead (Pb), % 0
0 to 0.25
Manganese (Mn), % 0 to 0.55
0 to 0.5
Nickel (Ni), % 0
1.0 to 3.5
Silicon (Si), % 0 to 0.18
0.5 to 2.0
Titanium (Ti), % 0.15 to 0.3
0
Zinc (Zn), % 0 to 0.070
0.5 to 5.0
Residuals, % 0 to 0.1
0 to 0.3