Resource

Reading a 316L mill certificate: what it proves

What this resource changes in your next decision, and the evidence behind it.

Reviewed by Engineering Lead

Takeaways

  • A mill certificate covers the material that was bought, identified by heat number. It is not a product certificate.
  • It says nothing about the clasp, the jump ring, the solder or the post unless those parts carry their own papers.
  • Match the heat number on the certificate to the lot received before you repeat a material claim.

The problem it answers

Evidence and limits

Written against the certificates we receive from our material suppliers and the wording we publish. Market requirements differ; this is not legal advice.

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