Soft Magnetic Materials Guide: Silicon Steel, Permalloy & Selection

Soft Magnetic Materials Guide: Silicon Steel, Permalloy & Selection

Short answer: Soft magnetic materials magnetise and demagnetise easily (low coercivity), making them the active core of transformers, motors, inductors and sensors; selection balances permeability, core loss and cost across silicon steel, permalloy, Fe-Co and amorphous alloys.

At a Glance

Soft Magnetic Materials Guide: Silicon Steel, Permalloy & Selection chart
Figure 1 – Soft Magnetic Materials Guide: Silicon Steel, Permalloy & Selection overview.

What Makes a Material ‘Soft’

Low coercivity and high permeability let the magnetisation follow the AC field with little loss — contrast with Metal Magnetism Guide (which covers hard magnets too). Grain orientation matters: Silicon Steel Guide en Grain Structure Metals explain why GO steel beats NO steel in transformers; relate to Electrical Steel Supplier.

Choosing the Alloy

Grain-oriented silicon steel for transformers, non-oriented for motors, permalloy for sensitive sensors, Fe-Co for high flux density rotors, amorphous for ultra-low-loss efficiency. Pair with Metal Electrical Conductivity Guide en Metal Thermal Conductivity Guide for total design; laminations reduce eddy loss (see Anodizing Vs Powder Coating insulation).

Processing, QA & Supply

Stamp thin laminations (Metal Stamping Supplier), anneal to optimise grain (Annealing Vs Normalizing, Metal Recrystallization Temperature Guide), and verify with Metal Ndt Guide en Mill Test Certificate Guide. HXSCO supplies electrical steels with documented magnetic properties.

Get a Quote

Tell HXSCO your requirements and we will respond with a competitive quote and lead time.

Veelgestelde vragen

What are soft magnetic materials?

Materials that magnetise and demagnetise easily (low coercivity), used as cores in transformers, motors and sensors.

What is the difference between soft and hard magnetic materials?

Soft magnets switch easily with low loss; hard (permanent) magnets retain magnetisation.

Which steel for a transformer core?

Grain-oriented silicon steel — its oriented grains give the lowest core loss along the flux direction.

What is permalloy used for?

High-permeability nickel-iron alloys for sensors, shields and low-level signal transformers.

Do you supply electrical steel?

HXSCO supplies grain- and non-oriented silicon steel with documented magnetic properties.

Source Electrical Steel from HXSCO

HXSCO supplies grain- and non-oriented silicon steel and soft magnetic strip with documented core-loss properties. Send your grade and quantity for a quote.

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