En 10204 |link| -

"Test results from routine production monitoring show typical yield strength of 355 MPa. The supplied products comply with EN 10025." 3. Type 3.1 – Inspection Certificate Formal Name: Inspection certificate 3.1 Issued by: Manufacturer (but by an independent inspection department within the manufacturer) Third-party verification: None externally, but internally independent

The standard outlines four main types of inspection documents, designated by numbers: . The higher the number, the greater the level of verification and third-party involvement. en 10204

A steel mill produces 50 tonnes of S355J2 plates. The QC lab cuts samples from each plate, tests them, and issues a 3.1 certificate stating: "Heat No. H45678 – Yield 365 MPa, Tensile 510 MPa, Impact 47J at -20°C. Complies with EN 10025-2." 4. Type 3.2 – Inspection Certificate Formal Name: Inspection certificate 3.2 Issued by: An independent third party (not the manufacturer’s own inspection department) Third-party verification: Yes – by an entity recognized by the competent authority (e.g., a notified body, classification society, or independent inspection agency) The higher the number, the greater the level

For engineers, procurement specialists, and quality managers, understanding EN 10204 is not optional – it is essential to avoid costly liability, ensure regulatory compliance, and build products that are truly fit for purpose. The next time you see “EN 10204 Type 3.1” on a purchase order, you will know exactly what level of trust and traceability is being demanded. Disclaimer: This write-up is for informational purposes. Always consult the official EN 10204:2004 standard and relevant product specifications for legal and contractual compliance. H45678 – Yield 365 MPa, Tensile 510 MPa,