Primary purpose
A 3.1 certificate connects the supplied material to manufacturer records and relevant test results. It should be reviewed together with the drawing, material standard and project specification rather than treated as the complete approval on its own.
Typical content
The exact format varies by manufacturer and product.
- Manufacturer and product identification
- Material standard and grade
- Heat or lot number
- Chemical analysis
- Mechanical properties
- Applicable tests and results
- Authorised validation and date
Procurement review
Certification requirements should be clearly stated during enquiry and document review should be planned before dispatch. Heat identification should match the product marking or package tag.
This content is for general information. Final product and documentation requirements must be verified against the applicable standard, drawing and project specification.