Positive material identification (PMI) is an essential non-destructive testing (NDT) method utilized to verify that supplied materials conform to the proper standards and specifications. Specifically, PMI is used to confirm that the chemical composition of the metallic parts has the correct percentage of key elements, this ensures that material properties such as corrosion resistance meets the requirements.

The PMI is utilized for quality control and safety compliance and is an integral part of both production and asset integrity management across many industries including oil and gas, power generation, chemical, nuclear, aerospace, and metal fabrication.