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How to identify the true and false stainless steel

written words: [big] [middle] [small] QR code of mobile phone page 2018/2/3     Number of visits:     

How to identify the true and false stainless steel? Now our professional Anhui stainless steel pipe manufacturers will briefly introduce how you can identify them correctly. People often think that "stainless steel" is "stainless steel". If it is rusty, it must be counterfeit products. In fact, this is a little too taken for granted.


If the user uses it improperly, it will naturally rust if it is used in the environment or conditions beyond its corrosion resistance. Second, the stainless steel materials used in the products are corroded and rusted. It may also be due to the unreasonable material selection of the manufacturer, that is, the manufacturer chooses the inappropriate stainless steel brand as the raw material for the purpose of the product, or the manufacturer's production and processing technology is not up to standard. In any case, these are the manufacturers in the procurement and processing should face and solve. In view of the fact that the production and sales of inferior stainless steel still exist in the current market, as well as the market deception such as shoddy quality and forged quality certificate, how can we take the initiative in purchasing stainless steel materials, quickly detect these deceptive behaviors, and avoid the harm of fake and inferior stainless steel? For these stainless steel which may be equally bright, we should distinguish the truth from the appearance Fake advantages and disadvantages, even as experts are difficult to do, so is there any easy way?


Some people say: it's very simple. It's "stainless steel" that can't be sucked, but "stainless steel" if it can't be sucked. It's "stainless steel" that can't be sucked. At present, this kind of saying and practice seems to be very popular, and even some scientific and technological journals and TV programs have carried out this method. It is unscientific and extremely wrong for industry experts to deny this view and practice. Among the five major types of stainless steels that have been developed and applied in the world, only austenitic stainless steels (many 300 series and 200 series grades) are usually non-magnetic (or weakly magnetic after processing), while ferritic stainless steels (many 400 Series), duplex stainless steels, martensitic stainless steels and precipitation hardening stainless steels are all magnetic. Whether magnetic or not, each stainless steel has its own characteristics and applicable range. 300 series austenitic stainless steel is widely used, and modern ferritic stainless steel with magnetic properties is also used more and more. It can partially replace 300 series austenitic stainless steel in cooking utensils, household appliances, decoration, automobile exhaust system, petrochemical and other civil and industrial fields. For the austenitic stainless steel of 200 series, the cost is reduced and the strength is improved by replacing nickel with manganese and nitrogen. However, due to the decrease of its corrosion resistance, its application field is narrow, which is often in the fields requiring high strength, non-magnetic and low corrosion resistance, such as spring, electronic equipment, etc. But for the so-called "200 series stainless steel" which is popular in the Chinese market, its corrosion resistance and use value are even lower.


In terms of corrosion resistance, these products can not even be called stainless steel, nor can they be called 200 series stainless steel at all. In the current Chinese stainless steel market, it can be said that there is almost no real 200 series stainless steel. The so-called "200 series stainless steel" on the market is the current problem steel, fake and inferior steel, but it is just the non-magnetic austenitic steel just like 300 series austenitic stainless steel! It can be said that in the current Chinese market, magnet suction is often used to identify the advantages and disadvantages of stainless steel, which often connives at fake and inferior stainless steel At the same time, because of the cost factor, it has pushed out the non-magnetic 300 series austenitic stainless steel, and even made this kind of fake and inferior steel be used in the industry as the non-magnetic 300 series austenitic stainless steel.


It is obviously impossible to identify stainless steel by magnet suction. Is there any other practical and simple method? The answer is yes. In this paper, a simple method is introduced, that is to use stainless steel testing solution to identify, that is, to determine or distinguish some situations of the tested steel by observing the color change characteristics produced in the process of dissolving the measured steel. The "color change" is often related to the specific elements such as Ni, Mo and Mn in the tested steel.


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Contact person: Manager Zhang

Telephone: 0551-67191515/0551-66660221

mobile phone: 13637056111/15055701188

Fax: 0551-67191509

Mail: 109546365@qq.com

Address: No.168, intersection of Beijing Road and East 2nd Ring Road, Baohe District, Hefei (opposite to Guoqiang steel market)

No. 25-23, block B, wulimiao stainless steel market, Chaohu South Road, Hefei (opposite to wulimiao primary school)



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