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.
Table 1
| Size Category | Single defects, mm (1) | Defects with extension, mm | Max. extension, mm |
|---|---|---|---|
| A | 14 | 10 | 80 |
| B | 10 | 7 | 60 |
| C | 7 | 5 | 40 |
| D | 5 | 3 | 30 |
| E | 3 | 2 | 30 |
(1) The distance between single defects must be min. 50 mm; where the distance is lower, defects must be
considered with their extension.
Table 2
| Frequency Category | Number of defects | Number of defects with extension |
|---|---|---|
| a | 32 | 16 |
| b | 16 | 8 |
| c | 8 | 4 |
| d | 4 | 2 |
| e | 2 | 1 |
RUS