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Comprehensive range of Mechanical Testing with a dedicated Machine shop to assist in sample preparation. For industrial component suppliers or industrial plant operations, PMI inspection and material verification are key concerns.
Handheld XRF (HH-XRF) is a fast, non-destructive testing (NDT) technique for measuring alloy composition, confirm alloy grades, and perform PMI inspections. But, even with these limitations, XRF provides quick (two seconds for most alloys), typically non-destructive, in-situ testing. Starting in the 1980s, field portable XRF was best suited for testing stainless steels, chrome-molybdenum steels, nickel alloys, and cobalt alloys. Magnesium, Aluminum, and Silicon at levels below 0.5% is essential to meaningful testing of Aluminum. Nominal Value Inclusion (Figure 4) uses grade specifications to incorporate expected values of elements not visible to XRF PMI analyzers. SmartSort allows the PMI analyzer to automatically decide when to perform extended testing for light elements. Heavy-duty testing cycles (running many tests and long tests-60 seconds or more-with only a few seconds between each test). The ridged aluminum surface on the top of the PMI analyzer is directly tied in to the primary sources of heat within the instrument. Because alloyed metal is a favorable material (homogeneous and rich with strong, responsive elements) for HH-XRF testing, PMI analysis of irregular shapes or very small pieces can be easily accomplished.
Positive Material Identification (PMI) testing with HH-XRF generates a direct return on investment in many ways.

With dramatic hardware and software advances, HH-XRF based PMI programs can test more materials in less time with greater analytical confidence. With a wider range of "testable" materials, shorter test times (more testing productivity), simpler operation (more people can do the testing), high volume, redundant testing becomes a more cost effective strategy. Products used for this applicationDELTA Alloys and Metals Handheld XRF AnalyzerDELTA Handheld XRF PMI analyzers provide non-destructive alloy analysis to rapidly and accurately identify alloy grades and measure metal composition. State-of-art Testing Instruments well trained and qualified technical personnel, effective quality management system combine to deliver the services meeting all customer expectations.
The utility of Hand-held XRF (HH-XRF) analyzers, also known as PMI analyzers or XRF alloy analyzers, is explained in practical terms that apply directly to positive material identification (PMI) inspection. Specifically, 10x better detector performance, 5 to 50 times better sensitivity for most elements, a new ability to analyze light elements such as Mg, Al, Si, P, and S, high temperature "in-service" testing, and beam collimation for superior weld analysis are among the innovations discussed. The goal of material testing is not only to confirm that the material is correct, but also to correct the errant processes that cause mix-ups. This is a time saving feature that allows the user to use shorter tests most of the time but to automatically extend the testing when direct measurement of light elements is necessary for accurate grade ID.
However, when 2 dissimilar metals are abutted or co-joined, as can be the case with weld testing, the key is to narrow the x-ray beam, and then to be able to aim this narrow beam, so that the test can be specific to only one of the metals. For example, testing with a PMI analyzer at receiving eliminates the cost of lost labor and rejected assemblies.
Beyond an overview of the technology and its traditional uses, remarkable recent developments are identified and their impact is related directly to alloy PMI testing. While not a 100% metallurgical certification, Handheld PMI analyzers can typically measure 99.5+% of most industrial alloys.

Redundant testing with a PMI analyzer is the fastest and easiest way to find and eliminate material mix-ups. When testing hot samples, the voltage required to drive the Peltier to cool the detector increases.
PMI inspection at installation or fabrication again prevents lost labor and wasted material costs. This new design extends the analyzer's ability to handle the stress of hot, in-service PMI testing. This table indicates "how hard" the PMI analyzer must work to maintain the proper detector temperature. This weld measures 7 mm across - thus it would be practical to measure a center, a left, and a right edge for concentration differences. These are the kinds of differences one would expect moving from the edge of the weld to the center. And PMI testing when installation or fabrication is complete (final QC) prevents mix-ups and losses related to component failure or product rejection.

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