Dongguan 201 stainless steel belt Zeyang metal wholesale Alnico Magnets are traditionally classified using numbers assigned by the Magnetic Materials Producers Association (MMPA), for example, Alnico 3 or Alnico 5. Cast Alnico Magnet Cast Alnico Magnet,Cast Alnico Block Magnet,Cast Sintered Alnico Magnet,Strong Cast Alnico Pot Magnet Jinyu Magnet (Ningbo) Co., Ltd. , http://www.magnetbonwin.com
304 (18Cr-8Ni) material: As a kind of widely used steel, it has good corrosion resistance, heat resistance, low temperature strength and mechanical properties; good hot workability such as stamping and bending, no heat treatment hardening phenomenon (no magnetic, Use warm 茺-196 ° C ~ 800 ° C). Uses: household items (1, 2 tableware, cabinets, indoor pipelines)
The 304 stainless steel strip is a versatile stainless steel material that is more rust resistant than the 200 series stainless steel. High temperature resistance is also good, can be as high as 1000-1200 degrees. The 304 stainless steel strip has excellent stainless corrosion resistance and good resistance to intergranular corrosion. For the oxidizing acid, it is found in the experiment that the 304 stainless steel strip has strong corrosion resistance in the nitric acid below the boiling temperature of ≤ 65%. It also has good corrosion resistance to alkaline solutions and most organic and inorganic acids.
304 (18Cr-8Ni) material: As a kind of widely used steel, it has good corrosion resistance/heat resistance, low temperature strength and mechanical properties; good hot workability such as stamping/bending, no heat treatment hardening phenomenon (no magnetic, Use warm 茺-196 ° C ~ 800 ° C). Uses: household items (1/2 category tableware / cabinet / indoor pipeline / water heater / boiler / bathtub), auto parts (windshield wiper / muffler / molded products), medical equipment, building materials, chemicals, food industry, agriculture, ship parts. Dongguan 201 stainless steel belt Zeyang metal wholesale 
Alnico magnets are produced by casting or sintering processes.[8] Anisotropic alnico magnets are oriented by heating above a critical temperature and cooling in the presence of a magnetic field. Both isotropic and anisotropic alnico require proper heat treatment to develop optimal magnetic properties-without it alnico's coercivity is about 10 Oe, comparable to technical iron, which is a soft magnetic material. After the heat treatment alnico becomes a composite material, named "precipitation material"-it consists of iron- and cobalt-rich[9] precipitates in rich-NiAl matrix.
Alnico's anisotropy is oriented along the desired magnetic axis by applying an external magnetic field to it during the precipitate particle nucleation, which occurs when cooling from 900 °C (1,650 °F) to 800 °C (1,470 °F), near the Curie point. Without an external field there are local anisotropies of different orientations due to spontaneous magnetization. The precipitate structure is a "barrier" against magnetization changes, as it prefers few magnetization states requiring much energy to get the material into any intermediate state. Also, a weak magnetic field shifts the magnetization of the matrix phase only and is reversible.
Alnico magnets are ideal for high temperature applications up to 550ºC
. Cast Alnico Magnet is very stable, has good corrosion resistance and a typical hardness of 50 Rockwell C. Once cast, the material is so hard that the only machining possible is grinding
. Cast Alnico Magnet represents the most versatile magnet material available. The range of properties can be accurately designed for specific applications by changes to element analysis and heat treatment.