Acid-resistant steel and stainless steel are both referred to as “stainless steel” in general. Stainless steel is resistant to atmospheric, steam, water, and another weak medium corrosion of steel, and acid-resistant steel is resistant to acid, alkali, salt, and other chemically corrosive medium corrosion of steel. Stainless steel from the beginning of the last century now has 90 years of history.
The invention of stainless steel is a great achievement in the history of world metallurgy. The development of stainless steel is an important material and technological foundation for the development of modern industry and scientific and technological progress. Heilongjiang stainless steel has various properties. In the development process, we gradually formed several categories.
Stainless steel, chromium-nickel-molybdenum stainless steel, low-carbon stainless steel, high-molybdenum stainless steel, high-purity stainless steel, and other four categories. According to the main chemical composition of steel, there are stainless steel, chromium-nickel-molybdenum stainless steel, low-carbon stainless steel, high-molybdenum stainless steel, high-purity stainless steel, etc.
Currently used classification methods classify steels according to their structural properties, their chemical composition, or a combination of the two methods. It is generally divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel, precipitation-hardened stainless steel, etc., or divided into two types: chromium stainless steel and stainless steel.