7xxx · Al-Zn · ASTM B221
7005-T6 Aluminum
Weldable 7xxx family option with higher strength than 6xxx. Density ~2.78 g/cm³.
Density
2.78 g/cm³
2780 kg/m³
Yield (Rp0.2)
290 MPa
typical
Tensile (Rm)
350 MPa
typical
Elongation
10%
A
Modulus E
70 GPa
elastic
Hardness
100 HB
T6
α thermal
23.5×10⁻⁶/K
expansion
k thermal
142 W/m·K
conductivity
Density vs the 2.70 myth
True density for 7005-T6 Aluminum is 2.78 g/cm³. Using 2.70 introduces a +2.96% mass error.
1 m² × 10 mm plate (correct ρ)
27.80 kg
Same plate if ρ = 2.70
27.00 kg
Weldability
Fair
Machinability
Good
Corrosion resistance
Good
Typical applications
- • Bike frames
- • Welded high-strength structures
Engineering pitfalls
- • Not as strong as 7075-T6
- • Weld procedure control still critical
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 B221.