Ensuring Surface Integrity in Ferromagnetic Materials

Magnetic Particle Testing (MPT), also known as Magnetic Particle Inspection (MPI), is a fast, reliable, and cost-effective non-destructive testing (NDT) method used to detect surface and near-surface defects in ferromagnetic materials like iron, nickel, and cobalt.

At Lady Dona Infra Projects Limited, our expert technicians use advanced MPT techniques to uncover cracks, laps, seams, and inclusions that are invisible to the naked eye—but critical to structural safety.

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🔧 How MPT Works

1. Magnetization: The component is magnetized using an electric current.

2. Application of Particles: Fine magnetic particles (dry or suspended in liquid) are applied to the surface.

3. Indication of Flaws: Any discontinuity in the material disturbs the magnetic field, causing the particles to accumulate over it.

4. Evaluation: These accumulations are then visually inspected under proper lighting or UV light (for fluorescent methods).

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📌 Key Benefits of MPT

• ✅ Detects surface and near-surface defects effectively

• ✅ Quick and economical inspection method

• ✅ Suitable for large and small components

• ✅ High sensitivity to fine cracks and flaws

• ✅ Immediate interpretation of results

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🧪 Suitable Materials & Components

MPT is applicable only to ferromagnetic materials, including:

• Carbon steels

• Alloy steels

• Cast iron

• Stainless steel (magnetic grades)

🔍 Typical Applications

• Weld joints & fillet welds

• Steel pipes, flanges, fittings

• Shafts, gears, bolts

• Castings & forgings

• Rail tracks and automotive parts

• Pressure vessels and tanks

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📜 Testing Methods We Use

• Dry Powder Method – For high-temperature surfaces and rough components

• Wet Fluorescent Method – High-sensitivity inspection using UV light

• Bench-Type & Portable Units – Depending on on-site or in-house inspection needs

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🛡️ Safety & Standards Followed

All inspections are carried out as per:

• ASME Section V

• ASTM E709

• IS 3703

• ISO 9934

• AWS D1.1 Structural Welding Code

Certified Level II and Level III personnel handle every inspection to ensure accurate and compliant results.

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📞 Book a Magnetic Particle Testing Service

Lady Dona Infra Projects Limited offers MPT services both on-site and at our fully equipped testing facility. Ensure your components meet safety and compliance standards—without compromise.