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Run an XRF (X-ray fluorescence) gun over the material. Extra quality mandates that trace element contaminants (e.g., sulfur, phosphorus) be below 0.005%. Even "premium" commercial grades often allow 0.015%.

Using a Vickers hardness tester, take five readings across the component surface. The extra quality standard requires all readings to fall within a 3% coefficient of variation (COV). Higher spread suggests a counterfeit. kvetinasbz extra quality

Please provide more context. For example: Run an XRF (X-ray fluorescence) gun over the material

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