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Positive Material Identification (PMI)

Positive material identification (PMI) is a specialised non-destructive testing (NDT) method that refers to the identification and analysis of materials. PMI enables the determination of both materials and alloys, and can be performed on-site or in a laboratory. In fact, XPERT testing services ensures accurate identification of the chemical makeup and percentage of key elements.

The NDT method does not cause damage to the original part and is commonly used to inspect, evaluate parts, materials, components and system for any welding defects or characteristic differences.

Application of PMI includes:

• Pharmaceutical manufacturing

• Aerospace manufacturing

• Failure analysis

• Plant inspection

• Testing pipes, valves, bolts and welds

Benefits of Positive Material Identification:

• Specific and accurate results

• Quick results for product sorting and verification

• Compliance with government and legal standards

• Assurance of product quality

Our high-quality service makes us a reputable NDT testing provider in Malaysia.

XPERT Engineering Solution is a reputable company that specialises in the provision of testing, inspection and quality assurance services in Malaysia.


PMI testing makes sure every single part of a system meets the designated specifications, including using the right alloy grade for critical replacement parts and ensuring all bought-in materials are given according to the standard requirements. This testing safeguards system operations and prevent safety failures.

PMI testing analyses the chemical composition of metals and alloys in a particular object during different stages of the manufacturing process. It can be done with either two techniques:

  1. X-Ray Fluorescence (XRF) analyser – The most typical method used.
  2. Optical Emission Spectroscopy (OES) – Detects almost all types of elements, including carbon and lighter elements and carbon steel.

PMI testing has a high accuracy level, measuring most of the common metals in alloys such as iron, nickel and copper to less than 0.01%.

PMI testing gives highly accurate and precise data while leaving no trace of testing on the test sample. It is vital for quality and safety control.