6xxx · Al-Mg-Si · ASTM B209 / EN AW-6061
6061-T6 Aluminum
The most common general-purpose structural aluminum. Balanced strength, weldability, and machinability. Density 2.70 g/cm³.
Density
2.70 g/cm³
2700 kg/m³
Yield (Rp0.2)
275 MPa
typical
Tensile (Rm)
310 MPa
typical
Elongation
12%
A
Modulus E
69 GPa
elastic
Hardness
95 HB
T6
α thermal
23.6×10⁻⁶/K
expansion
k thermal
167 W/m·K
conductivity
Density vs the 2.70 myth
True density for 6061-T6 Aluminum is 2.70 g/cm³. Using 2.70 introduces a 0.00% mass error.
1 m² × 10 mm plate (correct ρ)
27.00 kg
Same plate if ρ = 2.70
27.00 kg
Weldability
Good
Machinability
Good
Corrosion resistance
Good
Typical applications
- • Structural frames
- • Bike frames
- • Machine bases
- • Aerospace fittings
Engineering pitfalls
- • Weld heat-affected zone loses T6 properties unless re-heat-treated
- • Not as strong as 7075 for critical high-stress parts
Compare & related
Values are typical handbook figures for the stated temper (T6) and are intended for preliminary engineering. Production design must use certified material data and applicable design codes. Standard reference: ASTM B209 / EN AW-6061.