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關於不銹鋼 | 東翰不銹鋼  About Stainless Steel | Tong Han Stainless



Stainless steel is the generic term for a combination of alloy steel.  Alloy steel is composed of different metals (carbon, iron, chromium, nickel, manganese, molybdenum, etc.) according to different contents. The corrosion resistance of alloy steel depends on chromium. Therefore, when the chromium content is greater than 10.5%,  the alloy steel chromium oxide protective film can be formed, and it has the characteristics of being resistant to corrosion and rust.  

We refer to this type of alloy steel as stainless steel.


In terms of composition and organization, common stainless steels are divided into the following four categories:

  1. Ferritic Stainless Steel: 430 series is a very popular kind of this Steel.  Same as Austenitic Steel, it is a cold working products with very little Nickel, which allow it to be better in price but worse in corrosion resistance.

  2. Martensitic Stainless Steel: The most well-known stainless steel of this kind is 410 material. It contains less Nickel and Chromium than Austenitic stainless steel, and unlike Austenitic Stainless Steel, its mechanical quality is enhanced through heat treatment.  Though it shows excellent in mechanical efforts, its corrosion resistance performance is not that good on the other hand.

  3. Austenitic Stainless Steel: Main product of this kind of stainless steel is the 18-8 300 series product.  It is a cold working product to strengthen its mechanical properties, and regarding its outstanding corrosion resistance quality, it is widely used  in the industries.

  4. Precipitation Hardened Stainless Steel: With AISI coded 600 series, this kind of stainless steel is a modification based on 17-7 Austenitic Steel. The character of it is its high hardness. This kind of stainless steel is highly adopted in the aero industry.

Among them, our company uses Austenitic Stainless Steel, which has the best

corrosion resistance and heat resistance.

Chemical Composition Requirements

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