BS EN IEC 60404-6:2018+A1:2021

What is IEC 60404-6 about?

BS EN IEC 60404-6 is the sixth part of a multi-series that specifies methods for the measurement of AC magnetic properties of soft magnetic materials, other than soft ferrites, in the frequency range 20 Hz to 100 kHz. The materials covered by this part of IEC 60404 include those specialty alloys listed in IEC 60404-8-6, amorphous and nanocrystalline soft magnetic materials, pressed and sintered and metal injection moulded parts such as are listed in IEC 60404-8-9, cast parts, and magnetically soft composite materials.

The object of this part is to define the general principles and the technical details of the measurement of the magnetic properties of magnetically soft materials by means of ring methods. For materials supplied in powder form, a ring test specimen is formed by the appropriate pressing method for that material.

Who is BS EN IEC 60404-6 for?

BS EN IEC 60404-6 on magnetic materials is relevant to:

• Metal industry
• Manufacturers of electrical applications
• Mechanical engineers
• Metallurgists

Why should you use BS EN IEC 60404-6?

BS EN IEC 60404-6 guides you through the ring method to define the general principles and the technical details of the measurement of the magnetic properties of magnetically soft materials.

BS EN IEC 60404-6 covers the measurement of the relative amplitude permeability and the

AC magnetization curve and helps determine the peak value of the magnetic field strength, peak value of the magnetic flux density, r.m.s. amplitude permeability and the relative amplitude permeability.

Overall, accurate assessment of the magnetic properties can help you select the right materials as per the specific application need. The right materials, with improved permeability, can enhance the performance, energy efficiency and reliability of the product end-use.

What’s changed since the last update?

BS EN IEC 60404-6:2018+A1:2021 replaces the second published in 2003. This edition includes the following significant technical changes with respect to the previous edition:

• Adaption to modern measurement and evaluation methods, in particular, the introduction of the widely spread digital sampling method for the acquisition and evaluation of the
• Measured data limitation of the frequency range up to 100 kHz
• Addition of a new Clause 7 on the measurement of the specific total loss by the wattmeter method, including an example of the application of the digital sampling method
• Addition of an informative annex on the technical details of the digital sampling technique for the determination of magnetic properties