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.


Engineering Plastic

PET-P Engineering Plastic

PET P is a high-quality wear-resistant engineering plastic material with the chemical name polyethylene terephthalate. It is a crystalline material, a member of the polyester family of plastics, which should not be confused with the clear, amorphous version used to make bottles for carbonated drinks. PET exhibits particularly good dimensional stability and is available in a range of grades and forms to suit many applications.


While not as fine as Acetal, the machinability of the above grades of PET is excellent. As with all plastic materials, experience has shown that extra care must be taken with larger diameters, especially in the colder months when plastic materials lose some of their toughness and have less resistance to machining stresses. It’s important that these materials are not machined while in a chilled condition. Full machining instructions are available on request.

Chemical Resistance

PET has acceptable resistance to weak & diluted acids at 20°C. Contact with alkalis is to be avoided, as is long-term contact with water above 70°C because the material is sensitive to hydrolysis.

Typical Applications

Commercial applications for this engineering material include:

  • Mechanical engineering
  • Automotive and general machinery construction
  • Plain bearings
  • Seal rings
  • Guide rails
  • Cams and rollers
  • Clutch parts
  • Coil bodies

We stock PET P in round bar and 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 PET P 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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