China Neodymium And Ferrite Magnets Manufacturer & Supplier 
N48H is a material grade of NdFeB magnet, "48" stands for the relative strength of its magnetic energy product, while "H" indicates the material's ability to maintain better magnetic properties at higher temperatures (120°C). Below is an introduction to the characteristics, applications, thermal demagnetization behavior, demagnetization curve diagram and other related analyses of neodymium magnet N48H.
NdFeB N48H basic characteristic parameters:
Material grade: N48H
Residual magnetization Br: ≥13.6KGs
Coercivity Hcb: ≥12.8KOe
Endowed coercivity Hcj: ≥17KOe
Maximum magnetic energy product BH: 46-49MGOe
Working temperature: 120(℃)
N48H Processing aspects:
Magnetization method: axial magnetization / radial magnetization
Surface treatment: zinc plating, nickel-copper-nickel plating, epoxy resin, gold plating, etc.
Diversified sizes: can be customized into squares, round pieces, arcs, rings, hollow cylinders, special shapes.
Product Tolerance: Tolerance ± 0.05MM.
Environmental certification: All magnets are ROHS, REACH certified.
When to choose N48H?
Compared with conventional N35 magnets, N48H magnets maintain high remanence and coercivity even at high temperatures. If the working temperature of the equipment is 60 degrees Celsius, we can't directly choose N35 magnets (rated at 80 degrees Celsius); we also need to take into account that the temperature of the application equipment will gradually increase during the magnet's continuous operation, and N35 magnets will be demagnetized at high temperatures, while N48H can work more stably at 120 degrees Celsius.
N48H Strong Magnets Application;
N48H has the advantages of high remanence 13.6KGs, inherent coercivity Hcj17KOe, operating temperature up to 120℃, and is widely used in the field of head, horn, medical equipment, motor, sensor, etc.
Thermal demagnetization behavior of N48H neodymium magnet:
When a single magnet operates below the maximum operating temperature (about 120 ℃), the magnetic properties of N48H will decrease with the increase of temperature. However, when the temperature decreases, the magnetic properties will gradually recover. During this process, the performance is basically reversible, and the magnetic properties remain basically unchanged when returned to room temperature; When the temperature is 120 ℃<T<240 ℃, irreversible loss of magnetism occurs at high temperatures, that is, when it returns to room temperature, the magnetic properties decrease slightly compared to before; When the working temperature is>240 ℃, the irreversible loss of magnetic energy will sharply increase, and when it returns to room temperature, the magnetic force will sharply decrease compared to before. When the temperature is greater than about 300 ℃ (the Curie temperature of NdFeB), the magnetic force will completely disappear.
Neodymium magnet grade 48H demagnetization curve;
The above is a comprehensive introduction to N48 grade neodymium magnets. When using N48H magnets, it is necessary to pay attention to safety, as their magnetic force is relatively strong and may cause damage or injury in pinch, collision, and other situations. In addition, its magnetic properties may decrease in high-temperature environments, so this factor needs to be considered when designing applications.
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