Mill Test Certificate (MTC)

A Mill Test Certificate (MTC) — also called a manufacturer's/material test certificate — is the document issued by the producer certifying the chemical composition and mechanical test results of a specific heat/batch of material against the relevant standard. For construction the commonest are MTCs for reinforcement steel (IS 1786 — yield, UTS, elongation, bend/re-bend, chemistry incl. carbon equivalent) and structural steel (IS 2062), plus cement, structural bolts and other manufactured items, traceable to the batch/heat number marked on the material.

The MTC is the first line of incoming-material quality assurance: site QA verifies that the certificate corresponds to the delivered lot (heat number, section, grade), the values meet the specified IS grade, and the material is BIS-marked, before acceptance and use. For critical works it is typically cross-checked by independent third-party sampling and testing — the MTC supplements, not replaces, site verification — and is a key auditable record in the QA dossier and dispute resolution.