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  • What is the difference between stainless steel and stainless iron? How to distinguish?
    Jan 22, 2018

    stainless steel pipe

           1. What is the difference between stainless steel and stainless iron?

    Stainless iron is a kind of stainless steel, the models are: 409, 410, 430, 444, belong to the martensite and ferrite stainless steel, with the magnets will have magnetic, austenitic stainless steel 201, 202, 304, 321, 316 l, etc.

    Stainless steel is steel that can resist corrosion by chemicals such as atmosphere or acid.Stainless steel is not rusted, it is only in different media corrosion behavior is different.

    There are many kinds of stainless steel and different properties, which have formed several kinds in the process of development.

           1). According to the functional characteristics of steel, it is classified into low temperature stainless steel, non-magnetic stainless steel, easy cutting stainless steel, superplastic stainless steel, etc.

         2). According to the structure of the structure, it is divided into four categories: martensitic stainless steel (including precipitation hardening stainless steel), ferrite stainless steel, austenitic stainless steel and austenitic ferrite duplex stainless steel.

           3). According to the performance characteristics and use classification of steel, it is divided into stainless steel, sulphuric acid stainless steel, corrosion resistant stainless steel, stress corrosion resistant stainless steel, high strength stainless steel, etc.

    4). According to some characteristics of the main chemical composition of steel or steel elements to classification, divided into chromium stainless steel, chromium nickel stainless steel, nickel chromium molybdenum stainless steel and low carbon stainless steel, high purity, high molybdenum stainless steel stainless steel, etc.

    The current classification methods are classified according to the structural characteristics of steel and the chemical composition characteristics of steel and the combination of the two methods.It is generally divided into martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel and precipitation-hardened stainless steel, or are divided into chromium stainless steel and nickel stainless steel.

    2. How to identify stainless steel and "stainless iron" supplies?

    A lot of stainless steel products have steel seal surface, for example: 13-0, 18 - eight words, such as short term in front of the figures show that the product chromium content, behind the short term, the figures show that the nickel content in the product.Like 13-0, it only contains chromium without nickel, commonly known as "stainless iron";And 18-8 indicates that the product contains chromium and nickel, which is stainless steel.

    Tpping stainless steel or "stainless iron" products can also be used as a way of judging.Use permanent magnet to attract: true stainless steel is not attracted to the magnet, and "stainless iron" can be attracted by the magnet.

    Although "stainless iron" and stainless steel are different in nature, they are better than wrought iron and cast iron cookware in terms of their corrosion resistance.

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