Cryogenic Testing & Low Temperature Testing - ISO 15848-1 - TA-Luft
PMI (Positive Material Identification)
PMI or XRF-testing is the analysis of materials to determine the chemical composition of a metal or alloy at particular (usually multiple) steps of alloy manufacturing or in-process alloy installation. Knowing the exact composition and grade of an alloy enables suppliers, manufacturers, end users and other responsible parties in the chain of custody of components to match alloy specifications that are chosen for their specific properties such as heat resistance, corrosion resistance, durability, etc.
Because specifications for materials used in the industry are increasingly more specific, the need for PMI testing has been on an increase for the past several years.