What we do

HS Magnetics is a permanent magnet manufacturer in Hangzhou, China. We are one of the largest Alnico Magnet manufacturer in China, specialized in manufacturing AlNiCo magnets, Neodymium magnets, SmCo magnets and mangetic assemblies for more than 15 years. We supply permanent magnets and related magnetic material support service for your magnetic applications and design.

About US

Hangzhou HS Magnetics Co., Ltd. (HS MAGNET) was established in 2006 as an Alnico Magnet Manufacturer and is located in the city of Hangzhou.Now it has developed to cover all magnetic materials manufacturing and machining. The company covers an area of 20,000 square meters and has an annual turnover of 100 million yuan. We are a company engaged in the design, production and sales of various magnetic materials and magnetic application products. The company passed the ISO9001:2015 quality management system certification in 2006 and obtained various patent certifications.

Our main products are neodymium magnets, alnico magnets, samarium cobalt magnets and various magnetic components. From the moment we were established, product development, quality control and on-time delivery have been our philosophy. Our products are widely used in motors, speakers, generators, sensors, compressors, MRI, magnetic chucks and separators, etc. Most of our products are exported to Europe, North America, Southeast Asia and other parts of the world. Our products and company have won the trust of more and more customers.

Our company is nearby the Hangzhou Xiaoshan International Airport. There is only 4 kilometers far away from it. So it’s very convenient.Look forward to your visit to our company and cooperation with you. We will? offer you our best quality, best price and also best service.

Factory Corner


What are the classifications of permanent magnet materials?

Magnetic materials are classified as soft, hard, and semi-hard magnets, and permanent magnets are hard magnets. The characteristic of the hard magnet is that after magnetization, the magnetic input can be maintained for a long time. That is, the material has the function of maintaining magnetism.

Permanent magnet materials are divided into several categories.

Alnico permanent magnets were discovered during World War II and then used in military products. After the end of World War II, they were widely used in civilian products.?

Ferrite permanent magnets are a kind of permanent magnet material discovered after Alnico, which is made of iron oxide as the main raw material because it is cheaper than rare metals such as cobalt and nickel. It is widely used in many civilian products. It has also replaced some of the applications of Alnico to a certain extent. However, because of the ferrite’s poor resistance to high temperatures. The result is that ferrite permanent magnets are mostly used in the lower end of civilian products. With the development of technology, ferrite also has some new applications.

SmCo permanent magnet is a kind of rare-earth permanent magnet, the first rare-earth permanent magnet we discovered is not the NdFeB permanent magnet that we widely know now, but this kind of high performance and high-temperature resistant SmCo permanent magnet. This material has a high coercivity, magnetic energy product, and high-temperature resistance. But this material is more brittle and more difficult to process. Nowadays, samarium cobalt permanent magnets have a place in many applications that require high-temperature resistance and high magnetic properties.

Neodymium magnets are an excellent choice for many applications, especially for high-temperature and corrosive environments. They are also not prone to demagnetization and can maintain their best performance even under extreme conditions. Neodymium magnets have been shown to produce more than double the magnetic strength of ordinary magnets, which makes them ideal for demanding applications that require the use of heavy materials. These include everything from motors to speakers and air conditioners. The strength is due in part to the fact that they produce pure Nd2Fe14B magnet alloy which is difficult to find in standard permanent magnets because it costs more and takes time to manufacture as well as a lot of energy, but they’re worth it if you need a magnet with a really high pull force Neodymium Magnets are an excellent choice for many applications, especially for high-temperature or corrosive environments. They show no demagnetization, can maintain their best performance under extreme conditions, and provide double magnetic force power over common permanent magnets The reason why neodymium has such great magnetic power is that these are made with pure Nd2Fe14B alloy which is difficult to find in normal permanent magnets because it costs more time and energy

Soft Magnet and Perament Magnet?

Permanent Magnets are a type of magnet that creates a magnetic field that continues to exist after the magnet is no longer in contact with the object. This phenomenon is mostly seen in metals, such as iron and nickel. The permanency of magnetic fields in these materials has led to their use for many purposes such as compasses, loudspeakers, and electric motors.

A soft magnet is any magnetic material that reacts to heat, light, or electricity. Soft magnets are more malleable and less rigid than hard magnets (e.g., permanent magnets), which are typically made of metals such as iron or steel. The most well-known soft magnet is the plastic refrigerator magnet. Soft magnets can be created by shaping ferrous materials into a desired form and then coating them with a layer of non-ferrous metal, like nickel or copper.

What are the factors to consider when choosing magnetic materials?

When we talk to customers in various industries, many of them have questions about the selection of magnetic materials during the development of new projects. The most important aspect of the magnetic material application is indeed magnetism. But before that, we need to consider the impact of the application environment on the magnetic material. When simulating magnetism, the properties are often very different from those of real magnetic materials. As a result, much of the work needs to be reversed.

Temperature is the most important consideration in the selection of all magnetic materials. If the working temperature is too high, the magnet will be demagnetized by the high temperature. The temperature resistance of different materials is very different. Alnico has the best temperature resistance, but different grades of Alnico have different temperature performance. With the advancement of technology, the temperature resistance of NdFeB is also improved. We need to understand our application environment first.

In addition to temperature, the demagnetization phenomenon is caused by external magnetic interference. When the coercivity of a magnetic material is low, such as a ferrite permanent magnet, it is less resistant to the demagnetization effect caused by external magnetic interference or vibration. This is also an aspect that we need to consider.

There are also applications that require the demagnetization and re-magnetization of magnetic materials or reverse magnetization processes. We also need to consider that the coercivity should not be too high. Or we can use a magnetic material to magnetize another magnetic material in a more complex design.

In terms of magnetic properties, we have to consider the size of the magnetic flux on the surface, the calculation of the magnetic flux at a certain distance, etc. We have been able to calculate and simulate the magnetic flux of some magnetic materials with simple calculations, but in practice, the weaker the magnetic material is, the greater the deviation of the simulated magnetic properties.

With our expertise in Alnico magnetic materials, we have been able to customize many of our customers’ magnetic properties with parameters different from those available. For example, for automotive TPS sensors, we have increased the coercivity to over 2000 Oe and the remanence to over 9300 Gs, which is already a special grade of Alnico.