skip to navigation

What is sustained-load cracking?

  • SLC is a metallurgical phenomenon that occasionally develops in cylinders made of 6351 aluminum alloy, as well as in other types of pressure vessels and structural components under stress for sustained periods of time.
  • SLC has occurred in cylinders manufactured by various companies, including Luxfer. 
  • Cylinders that have been mechanically damaged, over-filled or abused are more susceptible to SLC. 
  • SLC is not a manufacturing defect; it is a phenomenon inherent in the metal itself.


Sign up

We’ll send you interesting SCUBA news, events and stories. Just drop us your email below.

Follow us on

Request information

Please fill in this form to contact us for sales, support or general inquiries. Thank you.







We respect your information and will never sell or pass on your email to 3rd parties. Please read our privacy policy.