People often with magnet adsorption of stainless steel material, verify the quality of true and false.
Don't absorb non-magnetic, think is good, on the other hand, is considered a fake fake.
Actually, this is a kind of unrealistic about it.
Recently, operating stainless steel window has more than 10 years of Mr Li told reporters, depend on whether the traditional magnetic to discriminant method of stainless steel, is likely to suffer.
According to his introduction, there are many different kinds of stainless steel and normal temperature can be divided into austenite size according to the organization structure and martensite or iron grain size.
Austenite size is non-magnetic or weak magnetic, martensite or iron grain size are magnetic.
However, is not necessarily so.
Such as usually used for decoration of austenite tube plate material 304, generally speaking is no magnetic, but caused by smelting chemical composition may also appear different magnetic fluctuations or processing status, it cannot be considered a counterfeit or substandard.
Another 304 stainless steel after cold working, the organization structure to martensite transformation, the greater the degree of cold deformation, martensitic transformation, the more the greater the magnetic steel.
On the contrary, a little quality time of 200 series stainless steel, is likely not magnetic, thus determine it is real stainless steel, would be a mistake.
Stainless steel is a great invention in the history of metallurgy in the 20th century, he is on the basis of the carbon steel to add a certain content of chromium elements made of smelting.
Stainless steel is not rust resistance, the key is because of containing chromium in steel.
The required minimum chromium content in the United States, the European standard for not less than 10.
After mass fraction, with)
, Japanese industrial standard provision is generally not less than about 11%, China's general think not less than 12%.
Because of the influence of chromium in corrosive medium, under the action of the generated on the surface of the steel a strong dense layer of oxide film, called 'passivation membrane.
The membrane to make metal dielectric isolation with the outside world, prevent the metal from being further corrosion;
And also have the ability to repair itself, if once destroyed, the chromium in steel can with the oxygen in medium to regenerate the passivation membrane, continue to protection.
Stainless steel stainless sex, but also related to use of the environment, different environment, to use the chromium content in different stainless steel.
The discretion of the chromium content is the fundamental factors to stainless steel performance.
So, no chrome, no stainless steel, general carbon steel and stainless steel containing chromium are magnetic material.
Stainless steel is divided into five categories: austenitic stainless steel and ferritic stainless steel, martensite stainless steel, austenitic -
Ferrite duplex stainless steel and precipitation hardening stainless steel.
Only one part of austenitic stainless steel and precipitation hardening stainless steel (
Austenitic precipitation-hardening stainless steel)
Is no magnetic, can't use magnet to absorb;
His stainless steel and the types are magnetic, can use a magnet to absorb.
In weak corrosive medium, such as air, water, steam and not rusty steel is stainless steel, the strong corrosive medium such as acid, alkali, salt solution in the corrosion of the steel is corrosion resistant steel, stainless steel not corrosion resistant, corrosion resistant must be stainless steel.
With 'tool' to distinguish true and false, stainless steel stainless steel quality is very wrong.
Dongguan small magnet products co. , LTD. , to expand knowledge: artificial magnet is how to do?
With magnetic object called a magnet, also called magnet.
Can keep for a long time of magnetic magnet is called a permanent magnet.
Permanent magnets and divided into two categories, natural magnets and artificial magnet.
Artificial magnet is usually made of steel or some kind of alloy, according to the need to have a bar magnet, magnet, horseshoe magnet needle, circular magnet, and other various shapes.
Artificial magnets, especially rare earth alloy magnetic is extremely strong, not only is much more stable.
In ferromagnetic substance molecules, due to the movement of electronic, form a ring current, called molecular electric current.
As a result of the existence of molecular electric current, every molecule is equivalent to a small magnets.
For a ferromagnetic objects, when these small magnets direction desultorily, magnetic cancel each other out, ferromagnetic objects doesn't external magnetic;
When the ferromagnetic objects in a magnetic field, due to the effect of external magnetic field, the direction of these little magnets consistent, ferromagnetic objects just shows the magnetic, this process is called magnetization.
Some magnetized ferromagnetic objects in the removal of the external magnetic field, the direction of the small magnets arranged to keep up, the ferromagnetic objects becomes a magnet.
Artificial magnet is created according to this principle.
When the artificial magnet heating, magnet temperature, not magnet in the intensified, the direction of the small magnets are arranged to chaotic changes, thus causes the magnet magnetic weaken or disappear.
Magnet company is the specialized production (
Powerful magnet company, has factories in dongguan city based wangniudun pier town.
Magnet products used in toys, jewelry, crafts gifts, handmade gift box, leather handbags invisible magnetic button, plastic hardware products, audio equipment and other industries.
Our company is located in dongguan city based wangniudun block cao beijiao town five chung village industrial zone, the company can provide customers 24 hours delivery, 36 hours to the customers specifications template.
Magnet experts will find magnet products co. , LTD. , dongguan city, pack your satisfaction, more information you can view our company website/magnet.
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Magnet products co. , LTD. , dongguan city site does not arrange the position, everything is equal to zero technical support: all network company address: China guangdong dongguan dongguan city based wangniudun town pier five chung industrial zone telephone: 0769 -
The 81313183 guangdong ICP for 16113157