Alnico Magnets Manufacturer

Alnico magnets are high-temperature permanent magnets engineered for stable magnetic output and excellent linearity. Ideal for sensors, instrumentation, audio transducers, and rugged industrial environments.

We supply Cast and Sintered Alnico and support machining (before magnetization), custom magnetization, matching sets, assembly, and inspection—prototype to volume.

Materials: Al–Ni–Co + Fe (tuned chemistry) Strength: stable output & linear response Temp: typical service up to 450–550°C* Options: machining / magnetization / matching
To quote fast, please provide:
  • Drawing + tolerance (or photo + dimensions)
  • Application & environment (temperature, corrosion, shock)
  • Target performance (flux / field / pull force)
  • Assembly: open vs closed circuit
  • Quantity & delivery schedule
Get Quote in 24 Hours Talk to Engineering

What Are Alnico Magnets?

Composition Primarily Aluminium (Al), Nickel (Ni), Cobalt (Co) and iron, with minor additions for tuning.
Why It’s Used Excellent temperature stability, predictable B–H behavior, and repeatability for precision circuits.
Best Fit Applications needing low drift and linear response, not necessarily maximum pull force.

*Max operating temperature depends on grade, geometry, heat treatment, and magnetic circuit design.

Key Features

High-Temperature Stability

Stable performance in hot environments; suitable for high-temperature sensing and industrial use.

Excellent Linearity & Low Drift

Predictable magnetic behavior for meters, transducers, and precision sensing elements.

Machinable Before Magnetization

Turning/milling/drilling in the non-magnetized state enables precision parts and complex geometry.

Circuit-Friendly Design

Works well in designed magnetic circuits; guidance helps reduce demagnetization risk.

Typical Applications

Sensors & Instrumentationposition/speed sensing, meters, measurement magnetic circuits
Audio & Pickupsguitar pickups, microphones, loudspeakers, consistent transducers
Automotive & Industrialhigh-temperature components, controls, switching devices, fixtures

Alnico Grades & Selection

We offer mainstream grades such as Alnico 2 / 3 / 5 / 5DG / 8. Selection depends on output requirement, temperature, geometry, and whether the circuit is open or closed.

Grade Type Typical Characteristics Recommended Use Typical Max Operating Temp.
Alnico 2 Cast Stable, linear response General sensors, instruments Up to ~450°C*
Alnico 3 Cast Selected circuit behavior; often application-specific Instrumentation circuits Up to ~450°C*
Alnico 5 Cast Higher Br; widely used Pickups, sensors, industrial use Up to ~450°C*
Alnico 5DG Directional Preferred-axis performance; improved stability Directional circuits, assemblies Up to ~450°C*
Alnico 8 Cast / Sintered Higher coercivity among Alnico; better demag resistance More demanding open-circuit designs Up to ~500–550°C*
Custom grades Other grades and tuned chemistry may be available based on targets and production volume.

*Values vary by standard, heat treatment, geometry, and circuit design. Final recommendation should be confirmed with drawings and conditions.

Tolerances, Magnetization & Surface Options

Tolerances & Dimensional Control Typical: blocks ±0.10 mm; rods ±0.05–0.10 mm; grinding available for critical dimensions.
Magnetization & Calibration Axial/radial/longitudinal; multipole for sensing; matched sets with controlled flux and polarity.
Surface Finish As-cast / shot-blasted / ground; nickel plating or painting available on request.

Manufacturing & Engineering Capabilities

Cast & Sintered Supply

Cast for larger classic shapes; sintered for smaller parts and consistency—prototype to mass production.

DFM & Circuit Review

Working point review (open/closed circuit) and structure advice to reduce demagnetization risk.

Assembly & Matching

Steel yokes/housings, flux matching, polarity control, calibrated output for pickups & sensors.

Inspection & Traceability

Dimensional checks, flux verification and reports/traceability available upon request.

FAQ

Is Alnico stronger than NdFeB or SmCo?
Generally no. Alnico has lower energy product but excels in high-temperature stability and linear response, especially in sensors and audio.
Will Alnico demagnetize easily?
Alnico has relatively lower coercivity, so open-circuit use or opposing fields can cause loss. Proper circuit design and magnetization direction improve stability.
When is Alnico the best choice?
When high temperature, stable output and repeatable magnetic fields matter more than maximum pull force—meters, sensing, and audio pickups.
Can you provide matched sets for pickups or sensors?
Yes. We can supply matched sets with controlled flux, polarity, and inspection records on request.
Send drawing + conditions → get grade recommendation + quotation

Preferred files: STEP / DWG / PDF. No drawing? Send photos + dimensions + target specs.

Send Inquiry Now Email Engineering