Stainless steel is generally 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 corrosion media such as acid, alkali, and salt. The difference between stainless iron and stainless steel lies in the level of nickel-containing components.
Stainless iron is made from recycled scrap iron, lead, steel, etc. through secondary re-processing and de-zipping. It is a type of stainless steel. The model number is: 409 410 430 444, which belongs to martensite and ferrite. Body stainless steel, using magnetite will have magnetism, austenitic stainless steel has 201 202 304 321 316L and so on.
Stainless steel (also known as stainless and acid-resistant steel) refers to steel that can resist corrosion from chemical media such as the atmosphere or acid. Stainless steel is not rust-free, but the corrosion behavior is different in different media. There are many types of stainless steel with different properties, and it has gradually formed several major categories in the development process.
According to the main chemical composition of steel or some characteristic elements in steel, it is classified 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 use of steel, it is divided into nitric acid-resistant stainless steel, sulfuric acid-resistant stainless steel, pitting-resistant stainless steel, stress-corrosion-resistant stainless steel, high-strength stainless steel, etc.;
How to distinguish stainless steel and "stainless iron" 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 short line indicates the chromium content of the product, and the number after the short line indicates the nickel content in the product. For example, 13-0 means that it contains only chromium and no nickel, commonly known as "stainless iron"; while 18-8 means that the product contains chromium and nickel, which is stainless steel. Negotiation from the voice: 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 by magnets, while "stainless iron" can be attracted by magnets. Although there are differences in the properties of "stainless iron" and stainless steel, they are significantly better than wrought iron and cast iron cookware in terms of their rust resistance.