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Eddy-Current Tests
 

Eddy-Current testing

  Surface quality grades

( d= nominal diameter of the rod or distance between parallel surfaces on square and hexagonal bars)
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
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
  Max.1.5 mm
for
d > 75 mm
Max. 0.75 mm
for
d > 75 mm
Max. percentage of delivery weight above the established defect limit 4% 1% 1% 0.2%
Test methods: Circograph (rotating scanning probes) and Defektomat
(encircling through-type coils)
Dimension: round 6-50 mm / hexagonal 6-36 mm / square on request

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