MT
Magnetic Particle Testing
Summary
Detects surface and near-surface discontinuities in ferromagnetic materials by applying a magnetic field and ferromagnetic particles.
Scope
Surface and near-surface examination of ferromagnetic materials.
Key Requirements
Governing Standards
- ASME Section V, Article 7
- AWS D1.1 Clause 6, Part C
- ISO 17638
- ISO 23278
What It Detects
- Surface-breaking cracks
- Near-surface cracks (to ~3mm depth)
- Laps and seams
- Crater cracks
Limitations
- Ferromagnetic materials only
- Near-surface only (~3mm max depth)
- Orientation-dependent
Required Certifications
- ASNT Level II MT
- ISO 9712 Level 2 MT
- PCN Level 2 MT
Applicable Materials
Carbon SteelLow Alloy SteelChrome-Moly (P22)
Applicable Processes
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