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Density of Aluminium Alloy 6061

ρAl=2,700 kg/m3\rho_{\mathrm{Al}} = 2,700\ \text{kg/m}^{3}
Value2.7 g/cm³ (2,700 kg/m³)
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StatusTypical value: varies by about ± 0.02 g/cm³ in practice
SourceNASA CR-123772, Materials Data Handbook: Aluminum Alloy 6061, 2nd ed. (Muraca and Whittick, for NASA Marshall, 1972; NASA: public use permitted), section 9.1: 2.70 g/cm³ (0.098 lb/in³)
CategoriesMaterial PropertiesEngineering & Trade
Density of Aluminium Alloy 6061 in every density unit
UnitValue
gram per cubic centimeter2.7 g/cm³
kilogram per cubic meter2,700 kg/m³
pound per cubic foot168.55549 lb/ft³
kilogram per liter2.7 kg/L
pound per cubic yard4,550.9983 lb/yd³
gram per liter2,700 g/L
pound per imperial gallon27.060515 lb/imp gal
pound per US gallon22.532592 lb/gal
8 more density units
microgram per liter2,700,000,000 μg/L
milligram per cubic meter2,700,000,000 mg/m³
milligram per liter2,700,000 mg/L
slug per cubic foot5.2388649 slug/ft³
gram per milliliter2.7 g/mL
tonne per cubic meter2.7 t/m³
US short ton per cubic yard2.2754992 ton/yd³
pound per cubic inch0.097543688 lb/in³

Learning zone

Pure aluminium is 2698 kg/m³ and the common wrought alloys sit within a percent of it: 6061 at 2700, 5052 at 2680, 7075 at 2810 because of the zinc. The number every designer actually uses is the ratio: aluminium is roughly one third the weight of steel, so a section of identical geometry weighs a third as much. That is the whole argument for aluminium ladders, truck bodies and heat sinks.

The trap is finishing the sentence there. Aluminium's stiffness is also about one third of steel's (69 GPa against 200 GPa), so an identical section is three times as flexible. Equal-weight aluminium members have to be made deeper or thicker to match stiffness, which is why aluminium structures look chunky. Weight advantage is real; stiffness advantage is not, and deflection rather than strength usually governs the redesign.

Used by 2 solvers

Density

ρ=mV\rho = \tfrac{m}{V}

Weight (W = mg)

W=mgW = m g
Revised 8 November 2026
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formula.expert. (2026, November 8). Density of Aluminium Alloy 6061. https://formula.expert/constants/density-aluminium-6061