ASTM E709
Full Name
ASTM E709 – Standard Guide for Magnetic Particle Testing
Scope
ASTM E709 provides guidelines for both dry and wet magnetic particle testing, a crucial method for detecting surface and near-surface discontinuities in ferromagnetic materials. This guide outlines the procedures for magnetization, application of magnetic particles, interpretation of indications, and demagnetization.
Key aspects covered in ASTM E709:
- Applicable materials: this guide specifically addresses the examination of ferromagnetic materials, which are materials that exhibit strong magnetic properties.
- Types of discontinuities detectable: ASTM E709 focuses on identifying discontinuities like cracks, laps, seams, inclusions, and other similar flaws that disrupt the material’s magnetic flux lines, making them visible under magnetic particle application.
- Techniques and variations: the guide discusses different magnetization techniques including direct and indirect magnetization, using prods, coils, yokes, and central conductors. It also outlines various particle application methods, such as dry powder, wet fluorescent, and wet visible, depending on the testing environment and sensitivity requirements.
- Procedure and interpretation: ASTM E709 provides detailed steps for the entire testing process, from surface preparation and magnetization to particle application and observation under appropriate lighting conditions. It also guides on interpreting the magnetic particle indications to determine the nature and severity of flaws.
- Demagnetization and post-cleaning: the guide emphasizes the importance of demagnetizing test objects after inspection and provides recommendations for effective demagnetization techniques. It also includes guidance on post-cleaning to remove residual magnetic particles.
ASTM E709 Accredited Inspection Agency and Laboratory
Applied Testing & Geosciences, LLC is accredited for performing inspections and tests using the ASTM E709 standard. We offer a range of customizable testing solutions to meet your specific needs and industry standards.
Contact us today to discuss your testing requirements and receive a quote.
Resources
Keywords
magnetic particle testing; discontinuities; magnetic flux; magnetic field; yoke magnetization; coil magnetization; prods; ferromagnetic; indications; demagnetization; magnetic flux leakage; wet method; dry method; fluorescent; non-fluorescent