UT SEP 1921/84 STANDARD
This spec is applicable to forged and hot-rolled, raw or processed steel bars in alloyed or non-alloyed steels, in natural state or treated condition. The inspection method for the search of internal defects can be freely chosen by the supplier (instrumentation, 1-4 MHz probes, coupling methods, etc.) as long as the test is carried out on the entire number of pieces. All defects (indications) bigger than the agreed-upon values must be described according to their position, size, extension and have to be reproduced in a drawing.
|Size Category||Single defects, mm (1)||Defects with extension, mm||Max. extension, mm|
(1) The distance between single defects must be min. 50 mm; where the distance is lower, defects must be considered with their extension.
Number of defects on individual pieces
|Frequency Category||Number of defects||Number of defects with extension|