Is the cost of stainless steel construction high?

Generally, the cost is more than 1 10,000 yuan a ton, and the profit is usually 50 to one ton in 200 yuan.

Stainless steel is the abbreviation of stainless and acid-resistant steel, and steel or stainless steel resistant to weak corrosive media such as air, steam and water is called stainless steel. Steel resistant to chemical corrosive media (acid, alkali, salt and other chemical corrosion) is called acid-resistant steel. Their corrosion resistance is different due to their different chemical compositions. Ordinary stainless steel is generally not resistant to chemical medium corrosion, while acid-resistant steel is generally stainless. The word "stainless steel" refers not only to one kind of stainless steel, but to more than 100 kinds of industrial stainless steel, and each stainless steel developed has good performance in its specific application field. The key to success is to find out the purpose first and then determine the correct steel grade. There are usually only six kinds of steel related to the application field of building construction. They all contain 17 ~ 22% chromium, and the better steel also contains nickel. Adding molybdenum can further improve the atmospheric corrosivity, especially the corrosion resistance to chlorine-containing atmosphere. The invention and use of stainless steel can be traced back to the First World War. Henry buhrer, a British scientist, was commissioned by the British military arsenal to study the improvement of weapons. At that time, the rifle bore used by soldiers was very easy to wear, and bucher wanted to invent an alloy steel that was not easy to wear. The stainless steel invented by buhrer Leigh won the British patent in 19 16 and started mass production. Since then, this kind of stainless steel accidentally found in the garbage has swept the world, and Henry buhrer Leigh is also known as the "father of stainless steel". During the First World War, British guns on the battlefield were always transported back to the rear because the bore was worn out and could not be used. The Ministry of Military Production ordered Colonel Li to develop high-strength wear-resistant alloy steel to solve the wear problem of gun bore. Li and his assistant collected all kinds of steels and alloy steels with different properties produced at home and abroad, conducted performance experiments on machines with different properties, and then chose the more suitable steel to make guns. One day, they experimented with a domestic alloy steel containing a lot of chromium. After the wear-resistant experiment, it was found that this alloy was not wear-resistant, which indicated that it could not make guns. So they recorded the experimental results and threw things in the corner. One day a few months later, an assistant rushed to bucher with a shiny piece of steel and said, "Sir, this is the alloy steel that Mr. Mulla sent me when I was cleaning the warehouse. Do you want to try it and see what special effect it has? " "good!" Buhrer looked at the bright steel and said happily. The experimental results show that this stainless steel is not afraid of acid, alkali and salt. This kind of stainless steel was invented by Mullah of Germany in 19 12. However, the mullahs don't know what this stainless steel is for. Li thought: "This kind of steel that is not wear-resistant but corrosion-resistant can't make a gun. Can it be used as tableware? " He kept his word and made stainless steel fruit knives, forks, spoons, fruit bowls and folding knives. The main types of stainless steel are usually divided into martensite steel, ferrite steel, austenite steel, austenite-ferrite (duplex) stainless steel and precipitation hardening stainless steel according to microstructure. In addition, it can also be divided into chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel. There is also a special stainless steel for pressure vessels, GB245 1 1_2009_ Stainless steel strip for pressure equipment. Ferritic stainless steel contains 15% ~ 30% chromium. Its corrosion resistance, toughness and weldability increase with the increase of chromium content, and its chloride stress corrosion resistance is better than other types of stainless steel, including Crl7, Cr 17Mo2Ti, Cr25, Cr25Mo3Ti and Cr28. Ferritic stainless steel has good corrosion resistance and oxidation resistance because of its high chromium content, but its mechanical properties and technological properties are poor, so it is mostly used in acid-resistant structures with less stress and as oxidation-resistant steel. This kind of steel can resist the corrosion of atmosphere, nitric acid and brine solution, and has the characteristics of good oxidation resistance at high temperature and small thermal expansion coefficient. It can be used in nitric acid and food factory equipment, and can also be used to manufacture parts that work at high temperature, such as gas turbine parts. Austenitic stainless steel contains more than 18% chromium, about 8% nickel and a few elements such as molybdenum, titanium and nitrogen. Good comprehensive performance, corrosion resistance to various media. Commonly used brands of austenitic stainless steel are 1Cr 18Ni9, 0Cr 19Ni9, etc. 0Cr 19Ni9 steel Wc