Eddy-current testing
In many cases, BESSEY is able to offer surface defect testing using eddy-current testing as standard.
Thanks to the addition of a new eddy-current crack detection system, which we brought on-line in May 2011, we are able to detect the smallest of surface defects over a wide range of different product sizes.
| Surface quality grades | 1 | 2 | 3 | 4 |
| Permitted defect depth | Max. 0.3 mm for d ≤ 15 mm |
Max. 0.3 mm for d ≤ 15 mm |
Max. 0.2 mm for d ≤ 20 mm |
Manufactured to be free of cracks (only possible with a subsequent machining) |
Max. 0.02 x d for 15 < d ≤ 100 mm |
Max. 0.02 x d for 15 < d ≤ 75 mm |
Max. 0.01 x d for 20 < d ≤ 75 mm |
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Max.1.5 mm for d > 75 mm |
Max. 0.75 mm for d > 75 mm |
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| Max. percentage of delivery weight above the established defect limit |
4 % | 1 % | 1 % | 0.2 % |
( d= nominal diameter of the rod or distance between parallel surfaces on square and hexagonal bars)
Test methods: Circograph (rotating scanning probes) and Defektomat (encircling through-type coils)
Dimension: round 6-50 mm / hexagonal 6-36 mm / square on request
