Characteristics of stainless steel products

According to the definition in GB/T20878-2007, stainless steel is a steel with stainless and corrosion resistance as its main characteristics, and the chromium content is at least 10.5% and the carbon content is no more than 1.2%.
Stainless steel is the abbreviation of stainless acid-resistant steel. Steels that are resistant to weak corrosive media such as air, steam, and water or have stainless properties are called stainless steels; and steels that are resistant to chemical corrosive media (acids, alkalis, salts, etc.) are called acid-resistant steels.
Due to the difference in chemical composition between the two, their corrosion resistance is different. Ordinary stainless steel is generally not resistant to chemical media corrosion, while acid-resistant steel is generally rust-resistant. The term "stainless steel" does not simply refer to one type of stainless steel, but refers to more than one hundred types of industrial stainless steel. Each type of stainless steel developed has good performance in its specific application field. The key to success is to first clarify the purpose and then determine the correct type of steel. There are usually only six types of steel related to the application field of building structures. They all contain 17-22% chromium, and the better steel types also contain nickel. Adding molybdenum can further improve atmospheric corrosion resistance, especially corrosion resistance to chloride-containing atmospheres.
Generally speaking, the hardness of stainless steel is higher than that of aluminum alloy, and the cost of stainless steel is higher than that of aluminum alloy.