![]() ![]() To prevent the problem occurring in the first place, we would advise a tool with a chip breaker to keep the size of the swarf to a minimum.Ī sharp cutting edge should also be at the forefront when machining stainless steel because it increases accuracy and ensures a smoother cut into the material. Some stainless steels, such as austentic, can form long spiral swarf which can cause a build up and be difficult to remove. The special design can create something called ‘silent machining’ thus improving surface finish. Due to the potential issues surrounding vibration (chatter), a variable helix tool should always be considered. Steel itself can be difficult, therefore Stainless Steel requires even more thought and planning in selecting the proper tool to avoid any issues. Machining using the correct data will ensure the best performance and tool life whilst reducing the risk of any damage or breakages. You should always machine stainless steel at the required surface feed and speeds, therefore researching the cutting data of the tooling you will be using is always advised before purchasing a machine just so you aren’t limiting your capabilities. A CNC machine is usually considered to be faster and more cost effective than a manual machine which is generally a requirement of optimal stainless steel machining. This leads us nicely on to the machine itself. This is due to the exceptionally hard characteristics of the material, therefore it is important that the machine and tooling used are correct for the application. One crucial thing to consider when machining stainless steel is to watch out for rubbing brought on by tool chatter (machine vibration). There are many factors to consider when machining stainless steel, particularly because this material is more challenging than standard steel and also materials with a higher alloy content are generally more difficult too. What do I need to look out for when machining Stainless Steel? Grade 410 is the most used of the 400 series. They are also much stronger and more magnetic. This series can be hardened by heat whereas 300 series grades cannot. This provides high wear resistance and strength. The 400 series stainless steel has a high carbon content. A big difference is that 316 contains a significant amount of molybdenum.Ĥ00 Stainless Series -These contain: 403, 405, 410, 416, 420 and more. Grade 316 has high amounts of nickel and chromium. It contains high amounts of chromium and nickel which give 304 stainless steel excellent corrosion resistance. 304, also known as A2 is the most commonly used austenitic stainless steel. The 300 series of stainless steel is mainly austenitic, and these grades are quite versatile. ![]() It is mainly used for general purpose metalwork.ģ00 Stainless Series -These contain: 303, 304, 316, 321 and more. It is non-magnetic and has low corrosion resistance. The 200 series of stainless steel is an austenitic alloy containing low amounts of nickel. Grades of stainless steel are generally categorised into different series:Ģ00 Stainless Series – These contain 201, 202, 244 and more. Different stainless steels have certain amounts of metals in them, and they are suited for all types of purposes. There are different grades and surface finishes, depending on where stainless steel is used. There are over 150 grades of stainless steel! This alloy is also magnetic and provides superior strength and corrosion resistance. Duplex – This is an alloy that is half austenitic and half ferritic. ![]() Ferritic - Ferritic stainless steel is magnetic and is often less expensive due to reduced nickel.Ĥ. This stainless steel has high carbon contents, which allow them to be tempered and hardened.ģ. Martensitic - The least common type of alloy. They have a high amount of chromium content and harder to machine.Ģ. Austenitic - The most common type of stainless steel. The four main types of stainless steel include: austenitic, martensitic, ferritic & duplex.ġ. What are the different types & grades of Stainless Steel? ![]()
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