Positive Material Identification is a non-destructive testing (NDT) method, which is used to verify the chemical composition of metals and alloys. It is also used to verify supplied materials conform to the proper standards. Handheld X-ray fluorescence is the most common used positive material identification method. It is portable, cost-effective method, which allows PMI to be performed in the field. Positive Material Identification is used to check accurate the chemical composition of the metallic parts. It ensures that material properties like corrosion resistance meets the requirements. It is used on variety of part sizes, which is ranging from large complex parts to small fasteners.