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7HF

Oil-Based Visible Magnetic Particle Suspension

A highly-sensitive oil-based magnetic particle aerosol for nonfluorescent (visible) wet method magnetic particle testing to locate fine and medium discontinuities on finished parts.

7HF provides clear, strong indications due to the heavy buildup of the highly magnetic particles. The convenient aerosol packaging is ideal for field testing, spot inspections and places where bulk processing is impractical, and the wide spray pattern makes it easy to cover large areas for faster processing during remote inspections of tubing, piping and large structures. 

7HF is often used with WCP-2 white contrast paint to improve contrast and inspection sensitivity.

Benefits

Maximize indication detection

Convenient to use

  • Inspect in all conditions without the need for darkness or UV lights
  • The visible particles come in a convenient, aerosol format to be easily carried and used in the field

Wide application versatility

Features

  • Clear indications under visible light
  • Heavy particle buildup
  • Great particle mobility
  • Protects parts and equipment against corrosion
  • Broad spray pattern provides even surface coverage over large areas
  • Superior surface wetting
  • Very small particle size
  • Works in visible light
  • Oil-based formula
  • Very low toxicity
  • Low odor

 

Ordering Information

Aerosol can (case of 12)01-1580-78

Product Properties

NDT TypeVisible Magnetic Particle Testing

Particle Suspension VehicleCarrier II (Petroleum Distillate)

Required EquipmentMagnetizing device

Applications

Ideal ApplicationDetecting fine and medium discontinuities, Difficult to reach areas, Field testing, In-service inspections, Light surfaces, Machined parts, Spot inspections

Defect ExamplesFatigue cracks, Grinding cracks, Inclusions, Laps, Quenching cracks, Seams, Shrink cracks, Tears, Welding defects

Compliance

StandardsAMS 3043, ASME BPVC, ASTM E1444, ASTM E709, ISO 9934, NAVSEA 250-1500-1, NAVSEA T9074-AS-GIB-010/271

Resources

Related Products

  • WCP-2

    WCP-2

    White contrast paint provides a high contrast background to improve probability of detection and sensitivity during visible magnetic particle inspections

  • Y-1 Yoke

    Y-1

    Ergonomic, lightweight electromagnetic AC yoke finds surface indications during magnetic particle testing

  • Y-7 Yoke

    Y-7

    Durable, high-strength electromagnetic AC/DC yoke finds surface and sub-surface indications during magnetic particle testing

  • P-Series Power Pack

    P-Series

    Portable power packs can be carried by hand to the inspection location and provide AC or HWDC magnetization

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