2091 aluminium alloy

2091 aluminium has chromium, copper, iron, lithium, magnesium as minor alloying elements.

Chemical composition ElementValueAluminum 91.9 - 95.4%Chromium≤ 0.10%Copper1.8 - 2.5%Iron≤ 0.30%Lithium1.7 - 2.3%Magnesium1.1 - 1.9%Manganese≤ 0.10%Other, each≤ 0.05%Other, total≤ 0.15%Silicon≤ 0.20%Titanium≤<= 0.10%Zinc≤ 0.25%Zirconium0.04 - 0.16%

Properties PropertiesValueDensity 2.58 g/ccTensile Strength, Ultimate 430 MPaTensile Strength, Yield 330 MPaElongation at Break 18 %Modulus of Elasticity 75.0 GPaCTE, linear 23.9 μm/m-°C @Temperature 20.0 - 100 °CSpecific Heat Capacity 0.860 J/g-°C at Temperature 100 °CThermal Conductivity 84.0 W/m-KMelting Point 560 - 670 °CSolidus 560 °CLiquidus 670 °C

Aluminium alloy table

References