China Neodymium And Ferrite Magnets Manufacturer & Supplier 
What comes to mind when you think of the strength of a magnet? Is it the amount of pull it has? Or how many gausses it has? Magnet strength it is a complex concept involving the nature of the magnet itself and its interaction with the external environment, the strength of the magnetic field is mostly used to express the magnetic induction strength (symbol B).
The strength of a magnet is determined by a number of factors, here are some of the main influences.
1, Magnet material itself magnetic properties
Different types of permanent magnet materials, their magnetic properties are very different. Taking the most commonly used permanent magnet material NdFeB magnet as an example, its remanent magnetization value and maximum magnetic energy product are much higher than that of traditional ferrite magnet, so it has stronger magnetic strength.
2, Manufacturing process
Even for the same material, different production processes can affect the strength of the magnet. Like NdFeB magnets, if the sintering process is used, the magnetic properties are usually superior to the injection molding process.
3, Size
A larger size of a magnet usually means that it contains more magnetic domains. Ideally, a larger size provides a stronger magnetic field.
The accompanying image below is a custom shaped curved bread rare earth neodymium magnets
4, Shape
Different shapes of magnets have different domain structures and flux distributions, which affect the overall magnetic properties.
5, Performance Grade
Regardless of the material of the magnet, has a number of grades, they have a difference in magnetic performance, generally the larger the data the better the magnetism. For example, ferrite Y35 grade is better than Y30 grade.
6, Temperature and environmental factors
The temperature of the magnet's working environment also affects its magnetism. Too high a temperature may demagnetize the magnet, and a magnet that is oxidized will also affect its magnetism.
7, Direction of magnetization
To obtain the maximum magnetic field, the direction of magnetization should be aligned as closely as possible with the direction in which the magnet is most susceptible to magnetization.
Understand the schematic of the direction of magnetization of a permanent magnet: Magnetization Direction Schematic Image of Permanent Magnets
The above 7 points are important factors in determining the strength of the magnet, I hope it is helpful to you, if you do not understand the place you can contact us, to provide you with answers to questions and magnet selection, quotation.
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Maximum Surface Magnetic Force Strength of Ferrite Magnets