Lasertron Blog

  • the many types of stainless steel and which you should be using

    Posted by Lasertron

    lasertron supplied the stainless steel panels for the fayetteville memorial park fountain

    Many people just consider that there is one type of stainless steel. Actually there are quite a few and the main difference is the quality, which is the amount of chromium that is added to the mix. The minimum is usually thought to be 10.5%. This mix was “discovered” by the French metallurgist Pierre Bertier around 1821 and was initially used for cutlery. The range of chromium added is from 13%, the usual minimum, to 26% used when the steel is exposed to harsh environments such as salt water.

    A quality mix which is designated as Type 316 is often used for skyscrapers such as the Jin Mao building in China. Architectural structures have used various types of steel such as the landmark NY World’s Fair Unisphere constructed from Type 304L, the St Louis arch in type 304, and the U.S. Air Force Memorial which is constructed of austenitic stainless steel.

    Over 70% of the total production of Stainless Steel is either 200 or 300 series. These grades contain a minimum .15% carbon, and a minimum of 16% chromium, and a sufficient nickel or manganese to retain its structure. When you reduce the nickel content and increase the manganese you effectively reduce the corrosion resistance. 304 steel, also known as 18/8 because it has 18% chromium and 8% nickel. Upgrading to 316 grade, normally used for marine applications, will contain at least 18% chromium and 10% nickel, which is why it is often called 18/10
    Ferritic stainless steels have better engineering properties than the austenitic grades mentioned above but they contain very little nickel and will have reduced corrosion resistance.

    With all these types one must be careful and match the steel to its intended use. Basically there are about 32 different stainless steel types. When you are planning a project be careful which steel your architectural metal designer chooses. Using lower quality steel from overseas may save you money in the near term but you’ll end up paying a lot more going forward both in maintenance and serviceability, not to mention the extended beauty of your project.

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  • Article coming january 20th

    Posted by Lasertron

    New Article on January 20, 2014

     

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