Aerospace series. Test method for metallic materials. Ultrasonic inspection of bars, plates, forging stock and forgings - Reference blocksWhat is BS EN 4050 3 Reference blocks for aerospace series about? BS EN 4050 3 is an international standard that discusses the test methods for metallic materials. BS EN 4050 3 specifies the requirements for the manufacture, checking, and marking of the series of ultrasonic testing reference blocks containing flat bottom holes (FBH) which defines the indicated defect size to which reference is made in EN standards. BS EN 4050 3 aids on the master test

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BS EN 16929 specifies test methods for the determination of natural frequencies

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Previously the requirements were spread across a number of different standards

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BS 817 is applicable to new surface plates and to plates that are being resurfaced after they have become worn

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Low-voltage equipment standards IEC 60947 and IEC 60439 currently include short-circuit ratings for products and assemblies respectively