
Positive Material Identification (PMI)
Public NDT
Active 7 months ago
Welcome to [NDT Inspection Portal]’s positive material identification (PMI) group, a place... View more
Public NDT
Group Description
Welcome to [NDT Inspection Portal]’s positive material identification (PMI) group, a place for professionals to connect and discuss the latest techniques and technologies in positive material identification.
PMI is a non-destructive testing method that is used to identify the chemical composition of a material. It is often used in industries such as aerospace, automotive, and manufacturing to verify the material grade of components and ensure compliance with specified material requirements. Our member group offers a platform for sharing knowledge and best practices on PMI and its applications in various industries. Join our community of experts from around the world and be a part of the conversation on advancing the practice of positive material identification.
Reply To: acceptance criteria of PMI
For acceptance criteria of PMI, it shall be demonstrated that materials contain the amount of alloying elements shown in the material specification. Alloys shall be deemed acceptable if the alloying elements are each within ten percent (10%) of the values.
Welds having consumable material content that matches, or nearly matches, the base metal composition within approximately twelve and half percent (± 12.5%) of the ranges allowed in ASME Section II, Part C for each element.
Acceptance criteria for dissimilar metal alloy welds shall be in accordance with the welding consumable material specified in the approved welding procedure. The effects of dilution between the different base metals and the filler metal shall be taken into account when determining the nominal as-deposited weld metal composition.