1xxx · Commercially pure Al · ASTM B209 / B221
1100 Aluminum
Commercially pure aluminum with excellent corrosion resistance and thermal conductivity. Soft and ductile — not a structural alloy.
Density
2.71 g/cm³
2710 kg/m³
Yield (Rp0.2)
35 MPa
typical
Tensile (Rm)
90 MPa
typical
Elongation
35%
A
Modulus E
69 GPa
elastic
Hardness
23 HB
H14
α thermal
23.6×10⁻⁶/K
expansion
k thermal
222 W/m·K
conductivity
Density vs the 2.70 myth
True density for 1100 Aluminum is 2.71 g/cm³. Using 2.70 introduces a +0.37% mass error.
1 m² × 10 mm plate (correct ρ)
27.10 kg
Same plate if ρ = 2.70
27.00 kg
Weldability
Excellent
Machinability
Poor
Corrosion resistance
Excellent
Typical applications
- • Heat exchangers
- • Chemical equipment
- • Reflectors
Engineering pitfalls
- • Low strength — do not use where structural load matters
- • Poor machinability compared with 6xxx series
Compare & related
Values are typical handbook figures for the stated temper (H14) and are intended for preliminary engineering. Production design must use certified material data and applicable design codes. Standard reference: ASTM B209 / B221.