Toolbox / MTC checker
Mill Test Certificate (MTC / MTR) Checker: EN 10204 3.1
Check the paper before you accept the lot: is it a real 3.1 certificate, do the reported chemistry and mechanical results meet the grade, and does it match your order? You review every value before it is checked.
1. Add the certificate
Scans and photos have no text to read yet. For those, use “Enter by hand”.
This tool compares a certificate with published limits. It reads the document, not the steel: it cannot test the material or confirm that a signature is genuine. Limits come from openly published mill and manufacturer datasheets and public specification summaries, each with its source; where we hold none, we say so. For acceptance, use the current standard and your inspector.
Frequently asked questions
What is the difference between EN 10204 3.1 and 3.2?
A 3.1 inspection certificate is issued by the manufacturer and validated by its authorised inspection representative, who is independent of manufacturing. A 3.2 certificate is also validated by the purchaser's representative or a third-party inspector, so it carries a second signature.
What is the difference between a 3.1 and a 2.2 certificate?
A 2.2 test report gives non-specific results, typical of the production, and is not an inspection certificate. A 3.1 certificate reports actual results from tests on the delivered material and its heat. The checker fails a 3.1 certificate that shows typical values.
What does MTC stand for, and what is an MTR?
MTC is mill test certificate (or material test certificate). MTR, mill test report, is the usual US name for the same document: the record of chemistry, mechanical tests and heat number for the supplied material.
How do you verify a mill test certificate?
Check the certificate type, the heat number against the material marking, the product standard and grade against your order, each chemical element and mechanical result against the grade limits, and the inspector's name and signature. The checker does these checks and shows the limit and source for each one.
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