Magnetic Particle Testing (MPI) – Wet Visible Powder Suspension | Black 400ml MR76S

MR®76S Magnetic Powder Suspension – Black (Aerosol)

High-Sensitivity Oil-Based Magnetic Particle Suspension

Description
MR®76S is a premium, oil-based magnetic particle suspension aerosol engineered for colored magnetic particle inspection. It delivers dark, strong, background-free crack indications for exceptional visibility under visible light conditions.
Packaged in a convenient aerosol can, MR®76S is perfect for on-site assessments, spontaneous inspections, and locations where bulk handling is impractical. The wide, even spray ensures full surface coverage, making it ideal for large components such as pipelines, tubing, and structural fabrications.
With MR’s proprietary Super Wetting Technology (SWT), particle mobility is maximized, ensuring reliable and repeatable flaw detection.

Key Benefits

• Strong particle build-up for clear, reliable detection

• Background-free indications under visible light

• Cost-effective solution for defect detection in ferromagnetic materials

• Ready-to-use aerosol for fast application

• Quick, repeatable inspection results

• Suitable for a wide range of ferromagnetic materials

• No odour and very low toxicity

Features

• Proprietary Encapsulation Technology for stability and performance

• Super Wetting Technology (SWT) for enhanced sensitivity

• Dark black colour for high contrast

• Minimal to no background for precise crack detection

• Controlled wide spray pattern

• Excellent particle mobility for improved sensitivity

• Toluene-free formula

Applications

Defect Location: Surface to slightly sub-surface
Test Surface Type: Unfinished to finished
Environment: Dark to semi-dark
Typical Defects Detected:

• Inclusions, seams, shrink cracks

• Tears, laps, flakes

• Grinding cracks, quenching cracks, fatigue cracks

• Welding defects, undercutting

Usage Instructions

• Method: Magnetic Particle Inspection – Wet method

• Carrier Media: Oil (AMS 2641 – Type 1)

• Equipment: Magnetising device required

• Recommended Usage Temperature: -10°C to +85°C (14°F to 185°F)

Specifications & Approvals

• Standards: ASME Code V, Art. 7 | DIN ISO 9934 (BS 5044) | ASTM E709 | RCC-M | PMUC (EDF)

• Aerospace Approvals: AMS 2641 Type 1 | AMS 3041 | AMS 3043 | ASTM E3024 | ASTM BPVC | MIL-STD-2132 | ASTM E1444/1444M

Physical & Chemical Properties

• Appearance: Black oily liquid

• Particle Size: 1 – 3 µm

• Sediment (1h): 1.2 – 2.4 ml/100 ml

• Colour in Visible Light: Black

• Colour in UV Light: No fluorescence

• Base: Hydrocarbon

• pH: N/A

• Odour: Characteristic

• SAE Sensitivity: 7

Available Packaging:

• 400 ml aerosol can