Mill Test

Definition - What does Mill Test mean?

A mill test is a procedure used to evaluate the quality and traceability of steel products from the manufacturing process to the final end user. It is reported in the form of a certificate that summarizes a variety of data including steel concentrations, processing activities and chemical and physical examination results, thus allowing one to verify the steel's quality.

Corrosionpedia explains Mill Test

The results of a mill test are reported to end-users via a mill's test certificate (MTC). According to industry best practices and standards, such a certificate should contain the following information, among others:

  • Name of the steel
  • Final test results
  • Steel dimensions, including diameter, thickness and length
  • Steel grade
  • Chemical analysis composition results
  • Mechanical test properties

Two main types of certificates are used: MTC EN 10204 3.1 (the most common, issued by manufacturers) and MTC EN 10204 3.2 (less common, issued by authorized inspection agencies).

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