Positive Material Identification(PMI) ：
a. Purpose: For quality and safety control. PMI analyze the material grade and alloy composition to verify that supplied materials conform to the proper standards and specifications.
b. PMI Principle:
c. Application:
1). Income material verification.
2) Construction parts on-site analytical testing.
3) Unknown metal sorting.
4) Avoid any potential mix up.
5) Alloy Scrap sorting and recycle.
6) Verify the damage materials are meet the specification requirements.
