Strip magnet FeCrCo Magnet

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FeCrCo Magnet is an iron-chromium-cobalt permanent magnet alloy designed for planar octupole and multi-pole magnetization and offering good machinability. It is especially suitable for small, thin, and complex-shaped permanent magnet components used in telephones, tachometers, micro motors, micro relays and speakers.

Features

• Magnetic properties close to conventional permanent magnet alloys, available in isotropic and anisotropic grades.
• Good machining performance: can be drilled, shaved, ground, stamped and otherwise machined into precise shapes.
• Capable of very small and slender components: minimum wire diameter down to 0.05 mm; minimum strip thickness down to 0.1 mm.
• Excellent temperature stability and good corrosion resistance; high Curie temperature (~680 °C) with recommended maximum working temperature up to 400 °C.

Properties (by grade)

• CrFeCo4/1 (semi-hard): BHmax 4–8 kJ/m3 (0.5–1.0 MGOe); Br 800–1000 mT; Hcj 8–31 kA/m; Int. coercive force 9–23 kA/m; Density 7.7 g/cm3; Temp. coefficient (Br) ≈ -0.03; Remark: Isotropy.
• CrFeCo10/3: BHmax 10–13 kJ/m3 (1.1–1.6 MGOe); Br 800–900 mT; Hcj 31–39 kA/m; Int. coercive force 32–40 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.03; Remark: Isotropy.
• CrFeCo12/4: BHmax 12–18 kJ/m3 (1.5–2.2 MGOe); Br 750–800 mT; Hcj 40–46 kA/m; Int. coercive force 41–47 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.02; Remark: Isotropy.
• CrFeCo12/5: BHmax 12–16 kJ/m3 (1.5–2.0 MGOe); Br 700–800 mT; Hcj 42–48 kA/m; Int. coercive force 43–49 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.02; Remark: Isotropy.
• CrFeCo1/1 (semi-hard): BHmax 1–9 kJ/m3 (0.1–1.1 MGOe); Br 900–1300 mT; Hcj 2–8 kA/m; Int. coercive force 2–8 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.03; Remark: Anisotropy.
• CrFeCo12/2 (semi-hard): BHmax 12–36 kJ/m3 (1.5–4.5 MGOe); Br 1300–1450 mT; Hcj 12–40 kA/m; Int. coercive force 13–41 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.03; Remark: Anisotropy.
• CrFeCo24/6: BHmax 24–30 kJ/m3 (3.0–3.8 MGOe); Br 900–1100 mT; Hcj 55–66 kA/m; Int. coercive force 57–67 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.02; Remark: Anisotropy.
• CrFeCo28/5: BHmax 28–36 kJ/m3 (3.5–4.5 MGOe); Br 1100–1250 mT; Hcj 49–58 kA/m; Int. coercive force 50–59 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.02; Remark: Anisotropy.
• CrFeCo44/4: BHmax 44–52 kJ/m3 (5.5–6.5 MGOe); Br 1300–1450 mT; Hcj 44–51 kA/m; Int. coercive force 45–52 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.03; Remark: Anisotropy.
• CrFeCo48/5: BHmax 48–55 kJ/m3 (6.0–6.9 MGOe); Br 1320–1450 mT; Hcj 48–53 kA/m; Int. coercive force 49–54 kA/m; Density 7.7 g/cm3; Temp. coefficient ≈ -0.03; Remark: Anisotropy.

Sizes and models of FeCrCo permanent magnet alloy

• Strip: Thickness × Width (0.05–4) × (100–200) mm — available in soft and hard states.
• Wire: Diameter φ0.05 – φ8.0 mm — available in soft and hard states (minimum manufacturable wire diameter down to 0.05 mm).
• Bar: Diameter φ8 – φ60 mm — manufacturing: forging / hot-rolling.
• Tube: Examples of outer × inner diameter φ1 × (φ0.1–φ0.5) … φ30 (φ1–φ10) — available in soft and hard states.

Technical specifications

• Alloy composition: iron-chromium-cobalt (Fe-Cr-Co) permanent magnet alloy.
• Magnetization: suitable for planar octupole and multi-pole magnetization methods.
• Minimum manufacturable wire diameter: 0.05 mm; minimum strip thickness: 0.1 mm.
• High Curie temperature ≈ 680 °C; recommended maximum working temperature up to 400 °C.
• Good corrosion resistance and stable magnetic properties over temperature; available in isotropic and anisotropic grades according to application requirements.