Materials Test Certificate (MTC)

A materials test certificate (also known as a mill certificate or mill test report) provides verified evidence that steel material complies with the specified standard. An MTC typically includes: the standard reference, heat/cast number for traceability, chemical analysis results, mechanical test results (yield strength, tensile strength, elongation), and the testing authority's certification. MTCs are an essential quality document for structural steel — they provide traceability from the raw material to the finished product.