![]() ![]() Depending on the specific use case, stainless steel finds application in situations where maintaining cleanliness and hygiene is of utmost importance. Along with at least 1.2% carbon, stainless steel alloys also incorporate other elements in different ratios. Because of the protective coating that chromium forms on the stainless steel's surface, rust and corrosion are prevented. The alloy used to make stainless steel sheet metal normally has a minimum chromium percentage of 10.5% and is based on iron. Nevertheless, caution is advised when handling thin sheets of stainless steel. Its exceptional corrosion resistance renders it suitable for various uses, including water heaters and kitchen appliances. Stainless steel sheet metal serves a multitude of purposes, requiring occasional polishing based on the grade and specific application. The issue of oxidation is primarily cosmetic in certain cases, with no significant impact on the overall performance of the alloy. Among the three, duplex steel is the most cost-effective and offers remarkable corrosion resistance, making it ideal for structural purposes. Austenitic is the most prevalent, while the other two are less frequently utilized. There are three primary stainless steel grades: austenitic, ferritic, and duplex. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.Stainless steel's chemical composition guards against rust and related issues. NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. A post weld heat treatment is not necessary. ![]() Weight % (all values are maximum unless a range is otherwise indicated)Īlloy 304/304L can be readily welded by most standard processes. Ps = pitting/crevice corrosion can occur WPA Lowest Temperature (☏) at Which the Corrosion Rate Exceeds 5mpy CORROSION However, in environments that are sufficiently corrosive to cause intergranular corrosion of welds and heat-affected zones Alloy 304L should be used because of its low carbon content. In most instances, the corrosion resistance of Alloys 304, 304L and 304H will be roughly equal in most corrosive environments. Alloy 304/304L is not recommended for service in marine environments. ![]() For successful performance under these more severe conditions, higher molybdenum content is need such as 316/316L. At higher chloride levels the grade is susceptible to crevice corrosion and pitting. The alloy can also operate successfully in caustic solutions free of chlorides or Alloy 304/304L does not perform well in more highly reducing environments such as those containing chlorides and sulfuric acid.Īlloy 304/304L performs well in fresh water service with low levels of chlorides (less than 100ppm). The nickel present in the alloy provides resistance to moderately reducing solutions such as pure phosphoric acid, whatever the concentration, in cold solutions and up to 10% diluted hot solutions. The high chromium content of the alloy provides resistance to oxidizing solutions such as nitric acid up to 55% weight and up to 176☏ (80☌).Īlloy 304/304L also resists moderately aggressive organic acids such as acetic. It can be easily welded and processed by standard shop fabrication practices.Īlloy 304/304L has good resistance to atmospheric corrosion, foods and beverages and to many organic and inorganic chemicals in moderately oxidizing to moderately reducing environments. Alloy 304/304L has excellent strength and toughness at cryogenic temperatures.Īlloy 304/304L is non-magnetic in the annealed condition, but can become slightly magnetic as a result of cold working or welding. The alloy has excellent resistance to intergranular corrosion in the as-welded condition. The low carbon chemistry of 304L combined with an addition of nitrogen enables 304L to meet the mechanical properties of 304.Īlloy 304/304L resists atmospheric corrosion, as well as, moderately oxidizing and reducing environments. It is common practice for 304L to be dual certified as 304 and 304L. It is an economical and versatile corrosion resistant alloy suitable for a wide range of general purpose applications. Alloy 304/304L (UNS S30400/S30403) is the most widely utilized “18-8” chromium-nickel austenitic stainless steel. ![]()
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