ET
Eddy Current Testing
Summary
Uses electromagnetic induction to detect surface and near-surface discontinuities in conductive materials.
Scope
Surface and near-surface examination of electrically conductive materials.
Key Requirements
Governing Standards
- ASME Section V, Article 8
- ISO 15548-1/2/3
- ISO 17643
- ASTM E309
What It Detects
- Surface-breaking cracks
- Near-surface cracks
- Corrosion (wall thinning in tubes)
- Material variations
Limitations
- Conductive materials only
- Depth of penetration limited (skin effect)
- Geometry-sensitive
Required Certifications
- ASNT Level II ET
- ISO 9712 Level 2 ET
- PCN Level 2 ET
Applicable Materials
Carbon SteelLow Alloy SteelStainless Steel 304Stainless Steel 316AluminumNickel AlloysDuplex Stainless Steel