Standards For Ferrite Measurement

STANDARDS FOR FERRITE MEASURMENT

The "Basler Standard" is a specialized guideline for measuring ferrite content in austenitic and duplex stainless steels. This standard is widely recognized in the industry and is often referenced in conjunction with instruments designed for ferrite measurement.

Key Aspects of the Basler Standard:

• Measurement Method: The standard employs the magnetic induction method to assess ferrite content. This technique involves generating a magnetic field that interacts with the magnetic components of the specimen. Changes in the magnetic field induce a voltage proportional to the ferrite content, which is then evaluated. This method effectively recognizes all magnetic components within an otherwise non-magnetic structure, including delta ferrite and strain-induced martensite.

• Applications: The Basler Standard is applicable for on-site measurements of austenitic claddings and weld seams in stainless steel pipes, containers, boilers, and other products made of austenitic or duplex steel.

  Other Standard Specified For Ferrite Measurement:

  1. ANSI/AWS A4.2M/A4.2:1997

  This standard, titled "Standard Procedures for Calibrating Magnetic Instruments to Measure the Delta Ferrite Content of Austenitic and Duplex Ferritic-Austenitic Stainless Steel Weld Metal," provides guidelines for calibrating magnetic instruments used in measuring delta ferrite content. It emphasizes the importance of accurate calibration to ensure reliable ferrite measurements in weld metals.

  2. AWS A4.2M:2020 (ISO 8249:2018 MOD)

  This standard offers procedures for calibrating magnetic instruments to measure the delta ferrite content in austenitic and duplex stainless steel weld metals. It aligns with the international standard ISO 8249:2018, ensuring consistency in ferrite measurement practices globally.

  3. ISO 2178:2016

  Titled "Non-magnetic coatings on magnetic substrates — Measurement of coating thickness — Magnetic method," this standard specifies a method for measuring the thickness of non-magnetic coatings on magnetic substrates using magnetic induction. While its primary focus is on coating thickness, the principles outlined can be relevant for ferrite content measurement, especially when using magnetic induction methods.

  4. ASTM D7091

  This standard practice outlines the procedures for nondestructive measurement of dry film thickness of nonmagnetic coatings applied to ferrous and non-ferrous metals. It provides guidelines on using magnetic and eddy current gages, which are pertinent to ferrite measurement techniques.

  5. DIN EN ISO 2178

  This German-adopted European standard mirrors ISO 2178:2016, detailing the magnetic method for measuring the thickness of non-magnetic coatings on magnetic substrates. Its methodologies are applicable in contexts where ferrite content measurement intersects with coating thickness assessments.

Instrument complied with all above standards