What is the difference between stainless steel and stainless iron?

The difference between stainless iron and stainless steel lies in the composition of nickel.

Magnetic is iron, no magnetic is stainless steel, this statement is completely wrong, there are four systems in stainless steel, austenite, martensite, ferrite and two-phase body, which austenite without magnetic, but in processing due to the loss of some elements, resulting in slightly magnetic;

Therefore, it is recommended to judge by chemical inspection and comparison table of stainless steel composition.

Many everyday products that appear on the market now, although the signs say stainless steel, are actually "stainless iron" products. So, what is the difference between stainless steel and stainless iron? First let's see what is stainless steel and stainless iron? Difference in meaning:

Stainless steel is generally stainless steel and acid - resistant steel. Stainless steel refers to atmospheric, steam and water and other weak medium corrosion of steel, and acid resistant steel refers to acid, alkali, salt and other chemical corrosion medium corrosion of steel. Stainless steel, since the beginning of this century, to now has a history of more than 90 years. The invention of stainless steel is a major achievement in the history of world metallurgy. The development of stainless steel has laid an important material and technical foundation for the development of modern industry and scientific and technological progress. There are many kinds of stainless steel, different performance, it gradually formed several categories in the process of development. According to the structure, it is divided into martensitic stainless steel (including precipitate hardened stainless steel), ferritic stainless steel, austenitic stainless steel and austenitic ferrite duplex stainless steel and other four categories; According to the main chemical composition of steel or some characteristic elements in the steel to classify, divided into chromium stainless steel, chromium nickel stainless steel, chromium nickel molybdenum stainless steel and low carbon stainless steel, high molybdenum stainless steel, high purity stainless steel; According to the performance characteristics and use of steel classification, is divided into nitric acid resistance stainless steel, sulfuric acid resistance stainless steel, pitting corrosion resistance stainless steel, stress corrosion resistance stainless steel, high strength stainless steel; According to the functional characteristics of steel classification, it is divided into low temperature stainless steel, non-magnetic stainless steel, free cutting stainless steel, super plastic stainless steel. At present, the commonly used classification methods are based on the characteristics of steel structure and chemical composition and the combination of the two methods. Generally divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation hardening stainless steel, or divided into chromium stainless steel and nickel stainless steel two categories.

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