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by Answerbag Staff on July 9th, 2010

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Are stainless steel 316L& stainless steel 18/8 the same?

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  • by Brian Lewis on July 9th, 2010

    Answerbag Experts

    Great Answer

    Professionally Researched. (What's this?)

    Type 18/8, also known as type 304 stainless steel, differs in chemical composition from type 316L stainless steel. Type 316L contains less carbon (0.035 percent versus 0.08 percent), less silicon (0.030 percent versus 0.75 percent) and more molybdenum (2 to 3 percent versus 0 percent).

    References:

    Pennsylvania State University Erie: Stainless Steel

    Michigan State University: Composition of Typical Stainless Steels

    Resources:

    Farmingdale State College: Stainless Steels

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  • by vict6at on August 21st, 2010

    vict6at

    the main difference is the content of molybdenum that gives higher corrosion resistance to the SS 316L in particular in fluid containing chlorides like seawater and prevent "pitting corrosion" a localized form of corrosion

    http://www.corrosionist.com/Stainless_Steel_grades.htm

    http://www.corrosionist.com/Pitting_Crevice_Corrosion.htm

    Vitt

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