Aluminium Alloy BS L166 2014A-T4 Clad Sheet

Technical Data Sheet


Aluminium alloy BS L166 is the aerospace specification for 2014A-T4 Alclad sheet and strip. In order to combat 2014A's poor corrosion resistance, L166 is clad with pure aluminium. L166 is the same alloy as L164, and will always meet the chemistry and mechanical requirements for both, but is produced to tighter rolling tolerances. L166 / 2014A is alloyed with copper (3.90-5.00%) giving it high strength, which it retains after its heat treatment. As such L166 finds usage in many aerospace and defence high strength applications. Aircraft Materials stocks L166 in a wide range of sheet thicknesses ready for same day shipment. Many stock items can be dual-certified to both L166 and L164.

Chemical Composition Limits
Weight% Si Fe Cu Mn Cr Mg Ni Zn Ti+Zr Ti
L166 0.50 - 0.90 0.50 max 3.9 - 5.0 0.4 - 1.2 0.10 max 0.2 - 0.8 0.10 max 0.25 max 0.20 max 0.15 max

Typical Mechanical Properties


Grade Condition Thickness (mm) 0.2% Proof Stress Min (N/mm2) Tensile Strength Min (N/mm2) Elongation on 50mm Min (%)
L166 T4 0.4 - 1.6 240 385 14
L166 T4 1.6 - 6.0 245 390 14

Aluminium Alloy L166 is available in Sheet and Strip T4. For all stock availability of Aluminium L166 contact Sales.

Similar Specification
Clad 1050A Close Tolerance Rolled
BS L164

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Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.