![]() ![]() ![]() Does the stainless steel need to be heat treated? Duplex stainless steels can be used to avoid the stress corrosion cracking associated with austenitic stainless steels. Ferritic stainless steels and martensitic are generally more affordable than austenitic stainless steel because they have less nickel and sometimes less chromium than austenitic stainless steels, which can result in a loss of corrosion resistance. Grade 316 is similar to grade 304, but it has molybdenum as part of its chemical makeup, further increasing its corrosion resistance. This makes grade 304 an excellent choice when corrosion resistance is important. Austenitic stainless steels generally provide the most corrosion resistance because of their high amounts of chromium. Stainless steel is usually chosen for its corrosion resistant properties, but it is important to know that different grades provide different amounts of corrosion resistance. How much and what type of corrosion resistance is desired? Grade 416 is example of a ferritic stainless steel with added sulfur. It is very similar to grade 304 except that sulfur has been added to it for machining purposes. Similar to carbon steels, sulfur can be added to increase machinability grade 303 is an example of this. The machining process must be optimized to work at a rate that helps alleviate this issue, and the tools used for machining must also be kept in good working condition. Most grades of stainless steel can be machined, however, stainless steel is very susceptible to work hardening. If machining is required, special considerations must be accounted for when working with stainless steel. Does the stainless steel need to be machined? With precipitation hardened stainless steels, care should be taken to ensure that the original mechanical properties are not compromised during the welding process. Martensitic stainless are generally not suitable for welding, however, some martensitic stainless steel grades with lower amounts of carbon can be welded. Ferritic stainless steels such as grade 430 or grade 439 are also readily weldable, as are Duplex stainless steels. ![]() Grade 304L has lower carbon while 347 has niobium stabilizers added to it which help to deter intergranular corrosion. When welding austenitic stainless steels, grades such as 304L or 347 should be used. The most weldable stainless steels are typically in the austenitic group. Welding stainless steel is very different than welding carbon steel, and can lead to problems such as intergranular corrosion, hot cracking and stress corrosion cracking. Does the stainless steel need to be welded? Austenitic stainless steels are usually the best choice when it comes to formable stainless steels. Martensitic stainless steels like 410 tend to be brittle and are not readily formable. Try an austenitic grade such as 304 or a ferritic grade such as 430. If the application requires good formability, avoid the martensitic group of stainless steels. How much and what type of corrosion resistance is desired?ĭoes the stainless steel need to have good formability?.Here are 7 things to consider when choosing a stainless steel grade: However, having so many grades requires the know-how to select the appropriate one for the job. The diverse range of grades allows it to accommodate various applications across many different industries. Stainless steel, known primarily for its corrosion resistance, is used in a wide variety of applications. ![]()
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