Stainless 316/316L
Alloys are often added to steel to enhance its properties. Marine grade stainless steel, also called grade 316, is resistant to certain corrosive environments.
There are various types of stainless steel 316. Some of the more common types are the L, F, N, and H variants, each slightly different and each used for different purposes. The designation "L" refers to 316L steel, which has less carbon than 316.
Quality of 316 and 316L
Similar to Grade 304, commonly found in the food industry. But both grades 316 and 316L have better corrosion resistance and are stronger at high temperatures.
Difference between 316 and 316L
Stainless steel 316 contains more carbon than 316L. It is easy to recognize as L stands for "low", although less carbon, 316L is similar to 316 in almost every respect. Good for high-tension applications.
However, 316L is a better choice for heavy welding applications as 316 is not as resistant when welded as 316L (internal corrosion occurs in the weld). Reduces weld deterioration. Grade 316L stainless steel is also an excellent stainless steel for high temperature and high corrosion applications. Which is why it is popular for use in marine construction and structural applications.
Properties of Stainless 316
Grade 316 stainless steel is highly effective in acidic environments. This grade of steel is effective against corrosion caused by sulfuric, hydrochloric, acetic, formic and tartaric acids as well as sulfate and alkaline chlorides.
Typical applications of Stainless 316
Typical applications of 316 stainless steel include construction of exhaust manifolds, furnace parts, heat exchangers, jet engine parts, pharmaceutical and imaging equipment, valve and pump parts, chemical processing equipment, tanks and evaporator It is also used in pulp and textile processing equipment and for parts exposed to marine environments. Including work that requires various heat resistance, such as thermocouple protective sleeves.
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Quality of type 316L steel
The lower carbon content of 316L reduces harmful carbide precipitation. (Carbon is extracted from the metal and reacts with chromium due to heat reducing its corrosion resistance) as a result of welding. Therefore, 316L is used where welding is required to ensure maximum corrosion resistance.