New national standard 06cr19ni10 characteristics, uses and chemical composition

Characteristics, uses and chemical composition of the new national standard 06cr19ni10
06cr19ni10 is a new 304 grade released by China. The old 304 grade is 0cr18ni9.
American grade: 304
Japanese grade: SUS304
Chinese grade: 0Cr18Ni9 (old grade)
Chinese grade: 06cr19ni10 (new grade)
304 is a more common name, which is the American grade. The same material in Japan is usually preceded by SUS. 304 corresponds to SUS304, and 316 corresponds to SUS316.
Because the national standard is usually not easy to call, it is usually called national standard 304 and national standard 316.
06Cr19Ni10 stainless steel is an austenitic stainless steel with good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It is corrosion-resistant in the atmosphere. If it is an industrial atmosphere or a heavily polluted area, it needs to be cleaned in time to avoid corrosion. It is suitable for food processing, storage and transportation. It has good processing performance and weldability. Plate heat exchangers, bellows, household products, building materials, chemicals, food industry, etc.

By comparing the chemical composition of the new and old national standard 304 stainless steel, it is found that the chemical composition of the new grade 304 (06cr19ni10) is the same as that of Japan's SUS304. The new national standard grade is designed to be closer to international standards, and the price has also increased slightly.

06Cr19Ni10 Stainless steel implementation standard: GB/T20878-2007 JIS G4303:2005 　　
06Cr19Ni10 is a high alloy steel that can resist corrosion in air or chemical corrosive media. 　　
It has good surface and corrosion resistance, and does not need to undergo surface treatment such as plating, but exerts the inherent surface properties of stainless steel. It is a kind of steel used in many aspects, usually called stainless steel. Representative performance includes 13 chromium steel, 18-8 chromium-nickel steel and other high alloy steels. 　　
The mechanism of stainless steel rust prevention is that alloy elements form a dense oxide film, isolate oxygen contact, and prevent further oxidation. Therefore, stainless steel is not "stainless". 　　
There may be the following reasons for the rust phenomenon of 06Cr19Ni10 material: 　　
1. Chloride ions exist in the use environment. Chloride ions are widely present, such as salt, sweat, sea water, sea breeze, soil, etc. Stainless steel corrodes quickly in an environment with chloride ions, even more than ordinary low-carbon steel. Therefore, there are requirements for the use environment of stainless steel, and it needs to be wiped frequently to remove dust and keep it clean and dry. (In this way, he can be charged with "improper use".) There is an example in the United States: a company used an oak container to hold a solution containing chloride ions. The container had been used for nearly a hundred years. In the 1990s, it was planned to be replaced. Because the oak material was not modern enough, it was replaced with stainless steel. 16 days later, the container leaked due to corrosion. 2. No solid solution treatment. The alloy elements were not dissolved into the matrix, resulting in low alloy content in the matrix structure and poor corrosion resistance. 　　
3. This material without titanium and niobium has a natural tendency to intergranular corrosion. Adding titanium and niobium, combined with stabilization treatment, can reduce intergranular corrosion. Stainless steel is a high-alloy steel that can resist corrosion in air or chemical corrosive media. It has a beautiful surface and good corrosion resistance. It does not need to undergo surface treatment such as plating, but exerts the inherent surface properties of stainless steel. It is a kind of steel used in many aspects and is usually called stainless steel. Representative performance includes high-alloy steels such as 13 chromium steel and 18-8 chromium-nickel steel. From the perspective of metallography, because stainless steel contains chromium, a very thin chromium film is formed on the surface. This film isolates the oxygen that invades the steel and plays a corrosion-resistant role. In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium.　 　　
06Cr19Ni10 is a general-purpose stainless steel that is widely used in the manufacture of equipment and parts that require good comprehensive performance (corrosion resistance and formability). In order to maintain the inherent corrosion resistance of stainless steel, the steel must contain more than 12% chromium. 　　
06Cr19Ni10 stainless steel is a grade of stainless steel produced in accordance with the American ASTM standard. 　　
06Cr19Ni10 is the most widely used stainless steel and heat-resistant steel. It is used in food production equipment, general chemical equipment, nuclear energy, etc. Edit this section Performance
06Cr19Ni10 stainless steel is the most widely used chromium-nickel stainless steel, with good corrosion resistance, heat resistance, low temperature strength and mechanical properties. It is corrosion-resistant in the atmosphere. If it is an industrial atmosphere or a heavily polluted area, it needs to be cleaned in time to avoid corrosion. It is suitable for food processing, storage and transportation. It has good processing performance and weldability. Plate heat exchangers, bellows, household goods, building materials, chemicals, food industry, etc.