[Argument] "Why stainless steel water pump with a magnetic"
It is often thought that the magnet adsorption of stainless steel, to verify the pros and cons and the authenticity of non-smoking non-magnetic, that is good, true; suction are magnetic, is considered counterfeit. In fact, this is a very one-sided, unrealistic error identification method.
[Demonstration] to give you talk about the type and shape of stainless steel at room temperature according to the organizational structure can be divided into several categories:
1. Austenitic type: such as 304,321,316,310, etc .;
2. Martensite or ferrite type: such as 430,420,410;
Austenitic type is non-magnetic or weak magnetic, martensite or ferrite is magnetic.
Usually used as decorative tubesheet stainless steel is mostly austenitic 304 material, in general is not magnetic or weak magnetic, but due to smelting caused by fluctuations in the chemical composition or processing status may also be different magnetic, but this can not be considered Counterfeit or unqualified, what is the reason?
The above-mentioned austenite is non-magnetic or weak magnetic, and martensite or ferrite is magnetic, due to segregation of the smelting component or heat treatment properly, will result in austenitic 304 stainless steel in a small amount of martensite or ferritin Body tissue. In this way, 304 stainless steel will be with a weak magnetic.
In addition, 304 stainless steel after cold, the organizational structure will be transformed into martensite, the greater the degree of cold deformation, the more martensitic transformation, the greater the magnetic steel. As a number of steel, the production of Φ76 tube, no significant magnetic induction, the production Φ9.5 tube. Due to Ling bending deformation of the larger magnetic induction on the obvious, the production of rectangular tube deformation due to large than the tube, especially the angle part of the deformation is more intense magnetic more obvious.
In order to completely eliminate the above-mentioned causes of 304 steel magnetic properties, can be restored by high temperature solution treatment stability of austenite, thereby eliminating the magnetic.
In particular, due to the above reasons, the magnetic properties of 304 stainless steel, and other materials of stainless steel, such as 430, carbon steel magnetic is not the same level, that is 304 steel magnetic always shows weak magnetic.
[Conclusion] Therefore, the stainless steel water pump is not an unscientific magnetic inspection method, it is recommended that the majority of users can use the laser material detector or sent to the material testing neutral identification. Water pumps are cast, welded, polished, assembled, tested and other processes, in these processes so that there is no magnetic austenitic stainless steel will be less with a magnetic. Thus demonstrating that stainless steel is not without magnetism is not correct.
It is often thought that the magnet adsorption of stainless steel, to verify the pros and cons and the authenticity of non-smoking non-magnetic, that is good, true; suction are magnetic, is considered counterfeit. In fact, this is a very one-sided, unrealistic error identification method.
[Demonstration] to give you talk about the type and shape of stainless steel at room temperature according to the organizational structure can be divided into several categories:
1. Austenitic type: such as 304,321,316,310, etc .;
2. Martensite or ferrite type: such as 430,420,410;
Austenitic type is non-magnetic or weak magnetic, martensite or ferrite is magnetic.
Usually used as decorative tubesheet stainless steel is mostly austenitic 304 material, in general is not magnetic or weak magnetic, but due to smelting caused by fluctuations in the chemical composition or processing status may also be different magnetic, but this can not be considered Counterfeit or unqualified, what is the reason?
The above-mentioned austenite is non-magnetic or weak magnetic, and martensite or ferrite is magnetic, due to segregation of the smelting component or heat treatment properly, will result in austenitic 304 stainless steel in a small amount of martensite or ferritin Body tissue. In this way, 304 stainless steel will be with a weak magnetic.
In addition, 304 stainless steel after cold, the organizational structure will be transformed into martensite, the greater the degree of cold deformation, the more martensitic transformation, the greater the magnetic steel. As a number of steel, the production of Φ76 tube, no significant magnetic induction, the production Φ9.5 tube. Due to Ling bending deformation of the larger magnetic induction on the obvious, the production of rectangular tube deformation due to large than the tube, especially the angle part of the deformation is more intense magnetic more obvious.
In order to completely eliminate the above-mentioned causes of 304 steel magnetic properties, can be restored by high temperature solution treatment stability of austenite, thereby eliminating the magnetic.
In particular, due to the above reasons, the magnetic properties of 304 stainless steel, and other materials of stainless steel, such as 430, carbon steel magnetic is not the same level, that is 304 steel magnetic always shows weak magnetic.
[Conclusion] Therefore, the stainless steel water pump is not an unscientific magnetic inspection method, it is recommended that the majority of users can use the laser material detector or sent to the material testing neutral identification. Water pumps are cast, welded, polished, assembled, tested and other processes, in these processes so that there is no magnetic austenitic stainless steel will be less with a magnetic. Thus demonstrating that stainless steel is not without magnetism is not correct.
Manufacturers recommend: Shenlong stainless steel submersible pump
Keywords:Stainless steel water pump, magnetic, real goods or fake
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