Pipe(tube mill) maker manufacturer - to treat 200 series stainless steel products to avoid disadvantages
The 200 series stainless steel is a chrome-manganese-nitrogen stainless steel, which was first developed during World War II. It was a stainless steel substitute that was produced to address the shortage of nickel during the war. After the end of World War II, 200 series stainless steel has been used within a limited range, generally used in the production of flagpoles, car wheels and other products. This product is listed in the ISO15510 (stainless steel smelting composition) standard. In the mature producers and consumers of mature stainless steel, its production and consumption account for only about 2% of the total stainless steel. Professional pipe making machine manufacturer, professional pipe making machine
According to the data, the 200 series stainless steels have different grades according to the nickel content, and the 200 series grades produced by various countries and enterprises are also different. The stainless steels of the 201 and 202 grades originally developed in the United States have a nickel content of about 4%. Although the corrosion resistance is slightly worse than that of the 300 series, it can still replace the 300 series in some fields.
At present, 201, 202 stainless steel circulating in the Chinese market is not really implemented in accordance with US standards 201, 202, which is to reduce nickel in the AISI standard, and other components have been adjusted, some performance improvements, and Corrosion resistance is reduced. However, precisely because of the low nickel content of the 200 series stainless steel, the 200 series has significant cost advantages and price advantages compared to the 300 series stainless steel. Pipe manufacturer, composite control pipe machine, pipe machine manufacturer
Due to the lack of an authoritative and unified standard for 200 series stainless steel in China, there will be a phenomenon of sub-filling in the use of the 200 series, leaving more hidden dangers for production and daily use. For example, some brands of 200 series stainless steel products have a nickel content of only about 1%, and the chromium content is lowered in order to achieve non-magnetic properties. This kind of variety not only has poor corrosion resistance, it is easy to rust, and it is easy to produce manganese vapor in the welding process to endanger people's health. Pipe manufacturer, composite control pipe machine, pipe machine manufacturer
Authorities in the industry have pointed out the hazards of these 200 series products (including less than 4% nickel):
1. Driven by interests, it is true that the counterfeit 200 series and 300 series (chrome-nickel stainless steel) products belong to the same “austenite” and also have “non-magnetic”. Therefore, a large number of counterfeit 300 series products are obtained in the final consumption. Profiteering, disrupting the normal market order.
2. Drive domestic “strip steel” enterprises to produce similar products in large quantities: Due to the high profits, domestic “strip steel” enterprises produce a large number of counterfeit 200 series stainless steel. At present, the production capacity of enterprises that can produce such products in the country is more than 2 million tons.we are tube mill manufacturer and tube mill supplier ,you can know it.
3. The corrosion resistance of counterfeit 200 series stainless steel products is far lower than that of 300 series stainless steel products. After the product is put into use, it will appear rust in a short period of time, which will bring great harm to the vast number of consumers, seriously damage the interests of consumers, and seriously invade the market share of domestic stainless steel formal products.
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