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310S Stainless Steel Rod In Hot Sale
Feb 01, 2018

As an important material in Aeronautics and Astronautics and chemical industry, 310S heat-resistant steel is widely used in high temperature environment. High temperature oxidation is the most common and most important form of corrosion failure at high temperature. Therefore, research and development of new materials with high temperature oxidation resistance will be of great significance for China's aviation industry, chemical industry and national defense industry, [1]. 310S austenitic stainless steel (0Cr25N I20) is a high chromium nickel austenitic stainless steel.

The role of nickel in stainless steel is to be used in conjunction with chromium.

1. Nickel is an excellent corrosion resistant material and an important alloying element of alloy steel. Nickel is the element that forms austenite in steel, but low carbon and nickel steel is to obtain the pure austenite structure, with a nickel content of 24%. However, the corrosion resistance of steel in some medium can be changed significantly only when nickel is 27%. So nickel cannot be made of stainless steel alone. But while nickel and chromium are present in stainless steel, stainless steel with nickel has many valuable properties.

Based on the above knowable, nickel as the role of alloying element in stainless steel, is that it makes the high quality of organization change, so that the corrosion resistance of stainless steel and process performance for some improvement.

2. Manganese and nitrogen can be substituted for nickel in chromium nickel stainless steel.

Cr-ni austenitic steel advantage although a lot of, but in recent decades because of nickel-base heat resistant alloy and nickel of less than 20% of the heat intensity development and application of steel, and the growing development of chemical industry of growing demand for stainless steel, nickel and mineral deposits is less and concentrated distribution in minority areas, therefore appeared worldwide nickel in terms of supply and demand contradiction. So in the field of stainless steel and many other alloys, such as large castings and forgings with steel, tool steel, refractory steel, etc.), especially the relative lack of resources of the country, nickel widely carried out section nickel and nickel with other element generation of scientific research and production practice, in this aspect research and application of more on manganese and nitrogen instead of nickel in stainless steel and heat resistant steel.

3. The effect of manganese on austenite is similar to that of nickel. But some say exactly, the effect of manganese is not formed austenite, but is that it slows the critical quenching of steel, increase the stability of austenite during cooling, inhibit austenite decomposition, keep high temperature to form austenite to to room temperature. In improving the corrosion resistance of steel, manganese has little effect, such as manganese in steel from 0 to 10. The change of 4% also does not make the corrosion resistance of steel in air and acid significantly change. This is because the manganese to enhance the role of iron base solid solution of electrode potential is not big, the formation of oxide film of protection is also very low, so the industry is in manganese alloying austenitic steel (such as mn18cr4 40, 50 mn18cr4wn, ZGMn13 steel, etc.), but they cannot be used as stainless steel. Manganese stabilizes the austenite in steel by about half the amount of nickel, or 2% of the nitrogen in steel is also stable and has a greater effect than nickel. For example, to make containing 18% chromium steel at room temperature for austenitic organization, generation of nickel with manganese and nitrogen low nickel stainless steel and the nickel, and chromium manganese nitrogen not steel has been used in industry, and some of which have been successfully replaced the classic 18-8 chromium nickel stainless steel.