Many alloying elements will have reactions and effects when applied together to the stainless steel structure, but no one has listed them specifically.These alloying elements include carbon, chromium, nickel, molybdenum, nitrogen, copper, silicon, manganese, titanium, and niobium, as well as phosphorus, sulfur, etc.

The main influencing factors of alloying elements on stainless steel are carbon, chromium, nickel, molybdenum, nitrogen, copper, silicon, manganese, titanium, and niobium, as well as phosphorus, sulfur, and phosphorus.

1) Carbon is a strongly forming and stabilizing element in austenitic stainless steel. As the carbon content in steel increases, the strength of austenitic stainless steel also increases. In addition, it can also improve the stress corrosion resistance of austenitic stainless steel in highly concentrated chlorides. However, in austenitic stainless steel, carbon is generally considered a harmful element. When welding or heating to 450-850 degrees Celsius, the carbon water will form carbides with the chromium in the steel, causing local chromium depletion and reducing the intergranular corrosion resistance of the steel.

2) Chromium: In stainless steel, chromium is an element that strongly forms and stabilizes ferrite, which can be regarded as small austenite. Chromium can increase the solubility of carbon and reduce the depletion degree of chromium. Therefore, increasing the chromium content is beneficial to the intergranular corrosion resistance of Ostrich Synchronous Modification. Chromium can also effectively improve the pitting and crevice corrosion resistance of austenitic stainless steel. Therefore, the greatest impact of chromium on the performance of stainless steel is corrosion resistance. The main performance is as mentioned above and there are other functions. For example, chromium can improve the performance of steel’s resistance to oxidation media and acidic chloride media.

3) Nickel: The main alloying element in stainless steel is nickel. Its main function is to form and stabilize austenite and obtain a complete austenite structure so that the steel has good strength, plasticity, and toughness, as well as excellent hot and cold workability and weldability. properties, low temperature, and non-magnetic properties. Nickel can also significantly reduce the cold work hardening tendency of austenitic stainless steels. Because nickel can improve the composition, structure, and performance of chromium’s oxide film, it improves the resistance of austenitic stainless steel to oxidizing media. At that time, the resistance to high-temperature sulfurization of steel was reduced, which was due to the formation of low-melting nickel sulfide at the grain boundaries in the steel.

4) Molybdenum: The main function of molybdenum is to improve the corrosion resistance of steel in reducing media, and to improve the resistance of steel to point and crevice corrosion. The hot workability of stainless steel containing molybdenum is worse than that of stainless steel without molybdenum. The higher the molybdenum content, the worse the hot workability. In addition, precipitation is easy to form in molybdenum-containing austenitic stainless steel. This deteriorates the plasticity and toughness of steel, and molybdenum’s resistance to pitting corrosion and crevice corrosion is about three times that of molybdenum.

5) Nitrogen: Nitrogen is increasingly becoming an important alloy element in chromium-nickel austenitic stainless steel. Nitrogen can improve the local corrosion resistance of steel. Its ability to form austenite is equivalent to that of carbon. As an interstitial element, nitrogen has a strong solid solution-strengthening effect, so its addition can significantly improve the strength of austenitic stainless steel. In acid media, nitrogen can improve the general corrosion resistance of austenitic stainless steel, and an appropriate amount of nitrogen can also improve the intergranular corrosion resistance of sensitized austenitic stainless steel. In a chloride environment, nitrogen significantly improves the resistance of austenitic stainless steel to pitting and crevice corrosion.