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ISO 9916:1991 Aluminium alloy and magnesium alloy castings - Liquid penetrant inspection
standard by International Organization for Standardization, 02/01/1991
Specifies a method for liquid penetrant inspection of discontinuities rising to the surface of aluminium alloy and magnesium alloy products and castings. Also defines severity levels as a function of the nature and number of discontinuities present. Annex A gives some indication types.
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