Teach you how to distinguish stainless steel from stainless iron?
Stainless steel is usually a general term for stainless steel and acid-resistant steel. Stainless steel refers to steel that is resistant to corrosion by weak media such as atmosphere, steam and water, while acid-resistant steel refers to steel that is resistant to chemical corrosive media such as acid, alkali and salt. The difference between stainless steel and stainless steel is the content of nickel content.
Stainless iron is made from recycled scrap iron, lead, steel, etc. through secondary reprocessing and degumming. This is a type of stainless steel. The 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 it uses magnetite. Austenitic stainless steels 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 the atmosphere or chemical media such as 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 been formed during the development process. According to the main chemical composition of steel or certain characteristic elements in steel, it is 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 is 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? Identification from the mark: Many stainless steel products are embossed 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 nickel content in the product. For example, 13-0 means that it only contains chromium and no nickel, and is often called "stainless steel iron"; 18-8 means that the product contains chromium and nickel, which is stainless steel. Negotiation from the sound: Knocking on stainless steel or "stainless iron" products can also be used as a method of judgment. Attract with permanent magnets: Real stainless steel is not attracted to magnets, while "stainless steel" is. Although "stainless steel" and stainless steel have different properties, they are significantly better than wrought iron and cast iron cookware in terms of rust resistance.
