A magnet manufacturer tackling the challenge. Today, there is demand for reputed brands of high-quality magnets. Sagami Magnets create new value. Please use our services. We look forward to your comments and requests. Neodymium magnets Samarium-cobalt magnets Ferrite magnets Neodymium plastic magnets Al-Ni-Co magnets This type of magnet achieves the highest magnetic energy of all permanent magnets now in practical use. The main phase of the magnetism of rare-earth magnets developed conventionally was a two-component alloy. However, neodymium magnets combine neodymium with iron and boron to constitute a three-component, anisotropic-sintered rare-earth magnet with an atomic ratio of Nd 2 Fe 14 B 1. The neodymium magnet exhibits excellent performance in terms of size reduction, thinning, weight reduction and enhancing the efficiency of applied equipment. However, its magnetic characteristics and corrosion-resistance performance require caution in use of the product at high temperature. For the dynamic characteristics of the product at high temperature, the Br temperature characteristics of the magnet must be sufficiently considered. - The main characteristics of neodymium magnets are as follows: a) Its maximum energy product (BH max) far exceeds that of ferrite (4.5 MGOe) and samarium-cobalt magnets (30 MGOe). Some models even exceed 48 MGOe. b) Since it consists mainly of relatively inexpensive neodymium and iron, it offers better cost performance than samarium-cobalt magnets that contain much cobalt, and poses no concern over availability. c) Although these magnets have temperature characteristics inferior to those of samarium-cobalt magnets, heat-resistant materials have been developed with higher magnetic coercive force for the following: NF-H series, NF-SH series and NF-UH series. d) Of the main components, iron accounts for nearly 70%. To ensure rustproofing, these magnets are equipped with Ni electrolytic plating as standard. * Caution that you should exercise For high-temperature demagnetization, refer to the Hcj temperature characteristics of the magnets. For the NF series, we therefore provide different materials with various Hcj levels. Even with the same material, these magnets vary in demagnetization characteristics according to shape. These materials also make the magnets prone to rusting. Therefore, the products should undergo surface treatment. - Surface treatment Our standard surface treatment is done by electrolytic nickel plating. We can also deliver magnets with other specifications that meet the uses of magnet users, such as gold plating, epoxy resin coating and fluororesin coating. * Click here for the surface treatment of neodymium magnets. Characteristics of magnets | Characteristic data | Characteristic distribution Demagnetization curve | Physical characteristics of magnet Manufacturing process | Standard dimensions Material name Residual flux density(Br) Magnetic coercive force (BH) max (Hcb) (Hcj) NF-H, NF-SH, NF-UH series kG/T kOe/kA/m kOe/kA/m MGOe/kj/m3 NF35H 11.8 - 12.5 1.18 - 1.25 ≥11.0 ≥875 ≥17.0 ≥1353 33 - 37 263 - 294 NF38H 12.2 - 13.0 1.22 - 1.30 ≥11.5 ≥915 ≥17.0 ≥1353 36 - 40 286 - 318 NF41H 12.6 - 13.2 1.26 - 1.32 ≥11.8 ≥939 ≥17.0 ≥1353 38 - 42 302 - 334 NF44H 13.0 - 13.7 1.30 - 1.37 ≥12.1 ≥963 ≥16.0 ≥1274 41 - 45 326 - 358 NF48H 13.7 - 14.3 1.37 - 1.43 ≥12.9 ≥1026 ≥16.0 ≥1274 45 - 49 358 - 390 NF35SH 11.8 - 12.5 1.18 - 1.25 ≥11.0 ≥875 ≥20.0 ≥1592 33 - 37 263 - 294 NF39SH 12.3 - 13.0 1.23 - 1.30 ≥11.6 ≥923 ≥20.0 ≥1592 36 - 40 287 - 318 NF42SH 12.8 - 13.3 1.28 - 1.33 ≥12.0 ≥955 ≥20.0 ≥1592 39 - 43 310 - 342 NF30UH 10.8 - 11.6 1.08 - 1.16 ≥10.2 ≥812 ≥25.0 ≥1989 28 - 32 223 - 255 Characteristics of magnets | Characteristic data | Characteristic distribution Demagnetization curve | Physical characteristics of magnet Manufacturing process | Standard dimensions Characteristics of magnets | Characteristic data | Characteristic distribution Demagnetization curve | Physical characteristics of magnet Manufacturing process | Standard dimensions Characteristics of magnets | Characteristic data | Characteristic distribution Demagnetization curve | Physical characteristics of magnet Manufacturing process | Standard dimensions   Temperature coefficient (20°C - Tw) Density (D) Curie temperature (Tc) Vickers hardness (HV) *Operating temperature (°C)   -%/°C g/m3 °C   Tw Series name αBr αH         NF-H series 0.11 0.6 7.3 - 7.5 320 - 340 500 - 600 <120 NF-SH series 0.1 0.6 7.3 - 7.5 340 - 400 500 - 600 < 150 NF-UH series 0.09 0.6 7.3 - 7.5 350 - 400 500 - 600 < 180 *Operating temperature This is when cylinder L/D = 0.7 (Pc≒2). If the L/D level is low (small thickness), other considerations are necessary. Characteristics of magnets | Characteristic data | Characteristic distribution Demagnetization curve | Physical characteristics of magnet Manufacturing process | Standard dimensions 1. Mix the ingredients. 2. Dissolve the mixture at high temperature and prepare an alloy. 3. Turn the alloy into fine powder. 4. When pressing the fine powder, apply a magnetic field to it and prepare a molded product of powder with aligned directions of magnetization. 5. Sinter the product at about 1,100°C, and then subject it to heat treatment at about 600°C to increase its magnetic characteristics. 6. Process the manufactured magnet base material and finish it into the product shape. 7. Subject the product to surface treatment in order to make it rustproof. 8. Apply a magnetic field to give the magnet magnetism.   Characteristics of magnets | Characteristic data | Characteristic distribution Demagnetization curve | Physical characteristics of magnet Manufacturing process | Standard dimensions     Dimensions Surface flux density Attraction OD   H GAUSS mT kg 1 × 3 ** ** ** 1 × 5 ** ** ** 2 × 1 2200 220 0.04 2 × 2 2800 280 0.04 2 × 3 3000 300 0.05 2 × 5 3100 310 0.05 3 × 1.5 2800 280 0.10 3 × 2 3100 310 0.11 3 × 3 3500 350 0.12 3 × 4 3700 370 0.13 4 × 2 3100 310 0.20 4 × 3 3600 360 0.23 4 × 5 4000 400 0.26 4 × 10 4300 430 0.27 5 × 1.5 2500 250 0.25 5 × 2 2900 290 0.29 5 × 3 3600 360 0.35 5 × 4 3900 390 0.39 5 × 5 4100 410 0.41 5 × 6 4300 430 0.42 6 × 2 2700 270 0.39 6 × 3 3400 340 0.49 6 × 5 4100 410 0.59 6 × 6 4300 430 0.61 6 × 10 4600 460 0.66 Dimensions Surface flux density Attraction OD   H GAUSS mT kg 7 × 3 3300 330 0.64 8 × 2 2300 230 0.60 8 × 3 3100 310 0.79 8 × 5 4000 400 1.0 8 × 8 4500 450 1.1 8 × 10 4700 470 1.1 9 × 3 2900 290 0.94 10 × 2 2000 200 0.80 10 × 3 2700 270 1.0 10 × 4 3300 330 1.3 10 × 5 3700 370 1.4 10 × 10 4700 470 1.8 12 × 1.5 1300 130 0.77 12 × 3 2400 240 1.3 12.5 × 2.0 1700 170 1.0 14 × 10 4400 440 3.4 15 × 1.5 1100 110 0.99 15 × 3 2000 200 1.8 15 × 5 3000 300 2.7 17.5 × 2.5 1500 150 1.8 19 × 10 4000 400 5.7 22 × 10 3700 370 7.1 25 × 6 2400 240 6.0 30 × 15 4000 400 14 40 × 10 2500 250 16 50 × 10 2100 210 21 ** Given its excessive measurement error, it has no value. * The surface flux density and attraction are only for reference.   Dimensions Surface flux density Attraction W   L   H GAUSS mT kg 10 × 5 × 1 1400 140 0.36 4 × 4 × 2 3000 300 0.25 10 × 7 × 2 2100 210 0.76 15 × 6 × 2.8 2700 270 1.2 10 × 3 × 3 3300 330 0.51 12 × 7 × 4 3300 330 1.4 50 × 20 × 4 1500 150 7.5 6 × 6 × 4.5 3900 390 0.72 15 × 10 × 5 3200 320 2.4 20 × 10 × 5 3000 300 3.0 20 × 12 × 5 2800 280 3.4 20 × 15 × 5 2600 260 3.9 30 × 30 × 5 1600 160 7.4 40 × 11 × 6 3000 300 6.6 20 × 20 × 10 3700 370 7.4 46 × 30 × 10 2500 250 17 24 × 24 × 12.5 3800 380 11 25.4 × 25.4 × 12.7 3700 370 12 50.8 × 50.8 × 12.7 2300 230 30 50.8 × 50.8 × 25.4 3800 380 49   * The surface flux density and attraction are only for reference.   Dimensions Surface flux density OD   ID   H GAUSS mT 5.7 × 3 × 4 2900 290 6.6 × 2 × 1.5 2600 260 9.5 × 3 × 1.2 1800 180 10 × 3.2 × 6 4300 430 12 × 7 × 6 4000 400 15.2 × 8.8 × 1.2 2000 200 18 × 7 × 6 4100 410 19.2 × 15 × 2 2700 270 23 × 18 × 2 2700 270 26 × 20 × 6 4100 410   * The surface flux density and attraction are only for reference. 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