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Welding Wire PMI What is PMI? - Positive Material Identification (PMI) - Astrolite Alloys PMI is an examination of welding wire and security-relevant components in regard to the used material. It’s on spot, non-destructive and verifies the compliance of the chemical composition of the materials used. Instead of relying on certificates of composition. PMI verification confirms that the alloy is as specified,… Continue Reading >