How to distinguish stainless steel from "stainless steel" products?
Stainless steel is made from recycled scrap iron, lead, steel, etc. through secondary reprocessing and zippering. It is a stainless steel. Models are: 409, 410, 430, 444, which belong to martensite and ferrite. The valve body is made of stainless steel and will be magnetic if magnetite is used. Austenitic stainless steel models include: 201, 202, 304, 321, 316L, etc.
Stainless steel (also known as stainless steel and acid-resistant steel) refers to steel that can resist corrosion from chemical media such as the atmosphere or acids. Stainless steel is not rust-free, but its corrosion behavior is different in different media. There are many types of stainless steel with different properties, and several major categories have gradually formed during the development process.
According to the main chemical composition of steel or certain characteristic elements in steel, it can be divided into chromium stainless steel, chromium-nickel stainless steel, chromium-nickel-molybdenum stainless steel, low-carbon stainless steel, high-molybdenum stainless steel, high-purity stainless steel, etc.
According to the performance characteristics and uses of steel, it can be divided into nitric acid-resistant stainless steel, sulfuric acid-resistant stainless steel, pitting corrosion-resistant stainless steel, stress corrosion-resistant stainless steel, high-strength stainless steel, etc.
How to distinguish stainless steel from "stainless steel" products? Identify from the mark: Many stainless steel products are stamped on the surface, such as: 13-0, 18-8, etc. The number before the dash indicates the chromium content in the product, and the number after the dash indicates the chromium content in the product. Nickel content in the product. For example, 13-0 means it contains only chromium and no nickel, and is often called "stainless steel." And 18-8 means the product contains chromium and nickel (stainless steel). The sound of judgment: Knocking on stainless steel or "stainless steel" products can also be used as a method of judgment. Attracts Permanent Magnets: Real stainless steel is not attracted to magnets, while "stainless steel" is. Although the properties of "stainless steel" and stainless steel are different, you can hardly tell the difference just by looking at them. Therefore, it is recommended that you buy products from trustworthy manufacturers to ensure safety.