About Smiths

We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

L156 / L157 / L158 / L159

Aerospace Aluminium Sheet

L156 Aerospace Aluminium Sheet

L156/L157/L158/L159/L166 & L167 - high strength aluminium alloy sheet which retains their strength after heat treatment.

High Strength Components

The alloy includes 4-5% copper alloy and is supplied in the fully heat-treated condition (solution heat-treated & artificially aged). The material offers very good machinability. The alloys finds extensive use in the aerospace and defence sector in the manufacture of high strength components.


L156 / L157 / L158 / L159 / L166 / L167 aluminium sheets are heat treatable, offer good strength after heat treatment. The material is easily plated and can be hard anodised. Corrosion resistance to atmospheric attack is poor.

Typical Applications

Commercial applications for this engineering material include:

  • Structural applications
  • High strength structural components
  • Aerospace fittings
  • Military vehicles
  • Aircraft structures and truck frames

We stock L156 / L157 / L158 / L159 in sheet.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for L156 / L157 / L158 / L159 is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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