How to identify a fake MTC type 3.2

A fake mill certificate is normally fairly easy to identify in MTC with orignal marking.

This example for steel material EN 10025-2, S355 K2+M.

A MTC type 3.1 as followed instruction and type of inspection document.

Common mistake in MTC type 3.2:

  1. Missing one of “customer name”, “customer number” or “purchase order”, “address”, “date of issue”,  “shipper”, “purchaser”, “distenation”, ” certificate number”, “location”. In case of  MTC verification, we are unable to trace in manufacturer data and in Surveyor report.
  2. Test samples were missed details of sample number, size, dimension, location of test.
  3. Plate marking or MTC shall not be identified the sequence plate number and heat number, test sample number, 
  4. The identification stamping were not used low-stress (dot-, vibratory-, and round V-) stamps
  5. Orignal markings were miss special stamp/stencile of rule requirements.
  6. Vendor supplies a scanned MTC with black/white color in lieu of full color/ dully stamped by Surveyor.

Follow sample marking photos are comply with MTC.

(Orignal markings)

(Red highlight should verify in MTC)

(Stamped markings are clearly identified by low stress stamps).

(Other markings to easy trace material, in case of stack up material)

(Surveyor verification)

How to avoid fake MTC type 3.2

  1. Send the MTC to manufacturer or Surveyor for verification. If material had certified type 3.2, it shall be fully facility to trace test report by Manufacturer/Surveyor. 
  2. Both verification of MTC and orignal marking before ordering.

Which information should submit to manufacture and surveyor for verification?

  1. Orignal marking photo and MTC must submit to classification society or manufacturer.

Sample photo of a fake MTC and its orignal marking (for reference).

(orignal marking are not comply manufacturer and rules)

(remarking information)

(Supply a scanned MTC with black/white color only).


Any discussion, please leave your commnents in the topic Original marking inspection on production.

Nguyen Duy Bien

Enjoy learning and researching, reading book. Knowledge welding inspection painting inspection.

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