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TECHNICAL REFERENCE / MAGNETIC TERMS

BHmax, Br, Hcb and Hcj: Magnetic Terms in Context

A concise terminology guide for engineers preparing a material, magnetic target or inspection discussion.

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ASTROMAGNET TECHNICAL REFERENCE / MAGNETIC TERMS DRAWING / APPLICATION / RELEASE

PROJECT BASIS

Keep the useful details together.

Understand BHmax, Br, Hcb and Hcj as industry-reference terms when preparing a sintered NdFeB magnet specification.

01 / TECHNICAL REFERENCE / MAGNETIC TERMS

Industry-reference definitions

Residual magnetic flux density after magnetization.

Resistance to demagnetization on the normal curve.

Resistance to irreversible demagnetization.

A material-level magnetic design indicator.

  • Br
  • Remanence
  • Hcb
  • Normal coercivity
  • Hcj
  • Intrinsic coercivity
  • BHmax
  • Maximum energy product

02 / TECHNICAL REFERENCE / MAGNETIC TERMS

Terms do not replace a part specification

These terms describe material or magnetic behavior, but they do not define the complete part. Geometry, magnetization direction, operating environment, coating and inspection method still need to be reviewed.

03 / TECHNICAL REFERENCE / MAGNETIC TERMS

Use the terms carefully in an RFQ

  • State whether the value is a target or a measured result
  • Identify the relevant grade or material basis
  • Describe the test or inspection expectation
  • Connect the magnetic target to the application function

04 / TECHNICAL REFERENCE / MAGNETIC TERMS

Have a magnetic target to define?

Share the target, geometry and operating context so the engineering review starts with the right reference.

  • Describe the Magnetic Target

CONTINUE THE REVIEW

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ENGINEERING HANDOFF

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Send the drawing, application context and commercial inputs available today. Open questions can be clarified during review.

Describe the Magnetic Target
PROJECT BASISPDF / STEP / STPAPPLICATION / MATERIAL / RELEASE