What is it ?
A Mill Test Certificate (MTC), or Mill Test Report (MTR), is issued by a manufacturer to certify the chemical and mechanical features of a product and its compliance to the applicable norms and technical specifications. Typically, Mill Test Certificates conform to the EN 10204 standard and are related to steel products.
A mill test certificate to EN 10204 shows, generally, the following information:
- Type of certificate and standard (example EN 10204 3.1 or EN 10204 3.2)
- Manufacturer name
- Product name and dimensions
- Quantity covered by the certificate (example: tons, with heat numbers)
- Heat numbers and batch number (physically shown on the product as well)
- Final test result
- Dimensional measurements, to check compliance with allowed tolerances (example, for steel pipes: diameter, wall thickness, length, straightness)
- Material grade and applicable specification, including results of chemical and mechanical tests
- Results of additional tests, like hydro-static, ultrasounds (UT), hardness, impact test, magnetic particles, metal graphic result etc.
- Addenda useful to appraise the full features of the product
Why is it important?
It is effectively a Guarantee that ensures Traceability and protects all parties
In many cases the material has no value to a customer unless it is accompanied by a test certificate.
Who issues it?
The manufacturing mill and/or an inspection authority.
Interpretation:
TYPES OF MILL TEST CERTIFICATE (EN 10204 2.1, 2.2, 3.1, 3.2)
EN 10204 3.1 Certification ( inspected only by shop quality control independent of manufacturing)
3.1 is a certificate issued by the mill which declares that the Material are
in compliance with the specification and includes the test results.
Test results are validated by the mill’s in–house test department
which has to be independent of the manufacturing department.
EN 10204 3.2 Certification ( by third party inspectors or both ) (independent of manufacturing)
3.2 Certification is more rigorous and the certificate is prepared jointly by the mill’s inspection department and an independent 3rd party inspectors like TUV or Lloyds Register. The certificate states that the Material are compliant with the relevant specification and the mill test certificate is included.
EN 10204 2.1 and 2.2 Certification
For Type 2 certificates the manufacturer declares compliance but does not specifically inspect the product. 2.1 certificates do not include test results and 2.2 certificates supplies test results based on sampling, or other methodology, and the Material tested will not necessarily be the Material supplied
- continuation in Part 2
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