What is the difference between 316 and 416 stainless steel

Most grades of stainless steel can be machined, however, stainless steel is very susceptible to work hardening. 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. Similar to carbon steels, sulfur can be added to increase machinability; grade is an example of this.

It is very similar to grade except that sulfur has been added to it for machining purposes. Grade is example of a ferritic stainless steel with added sulfur. 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.

Austenitic stainless steels generally provide the most corrosion resistance because of their high amounts of chromium. This makes grade an excellent choice when corrosion resistance is important. Grade is similar to grade , but it has molybdenum as part of its chemical makeup, further increasing its corrosion resistance.

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. Duplex stainless steels can be used to avoid the stress corrosion cracking associated with austenitic stainless steels. If the stainless steel is going to be subjected to heat treatment, it is important to know how the various grades of stainless steel can be affected.

For the most part, austenitic stainless steels and ferritic stainless steels are non-hardenable when heat treated. The heat treatable stainless steels are typically martensitic or precipitation hardened. Examples of these are grade C and PH , respectively. Very high strengths can be achieved with martensitic stainless steels, like grade C; and precipitation hardened stainless steels, like grades PH and PH. Austenitic stainless steels, such as grade , can provide high strengths as well, though not as high as the martensitic grades.

Austenitic stainless steels also have more nickel than other stainless steels, so a grade like will have greater toughness and ductility than ferritic and martensitic stainless steels.

Duplex stainless steels can provide ferritic stainless steel properties while still maintaining a ductility and a toughness close to austenitic stainless steels. I found the brochure Stainless Steel for Coastal and Salt Corrosion Applications to be very helpful as a general reference for using stainless steel in our area.

Not only is there the danger of exposing all your critical electrical components inside, it could cost you a lot to replace when it shorts out. The good news is we have a simple cost effective solution. We found that by using stainless steel instead of stainless steel on an outdoor enclosure that will be exposed to the elements like on an oil rig, for example not only increases the life span of the enclosure but it is much safer to be around.

We make sure we get one with every shipment we receive at Nema Enclosures so that we can assure our customers that the enclosure and its parts are constructed of the exact stainless steel material, as specified and ordered. Some small parts such as clamps and mounting feet, constructed of stainless steel are specifically marked, in this case a number 6 within a circle, as shown in the photo above.

Type , with its chromium-nickel content and low carbon, is the most versatile and widely used of the austenitic stainless steels. Type proves to be resistant to oxidation, corrosion, and durability. All provide ease of fabrication and cleaning, prevention of product contamination offer a variety of finishes and appearances. Type stainless steels are used in corrosion resistant electrical enclosures, auto molding and trim, wheel covers, kitchen equipment, hose clamps, exhaust manifolds, stainless hardware, storage tanks, pressure vessels and piping.

Are you an Engineering professional? Join Eng-Tips Forums! Join Us! By joining you are opting in to receive e-mail. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Students Click Here. Related Projects. I need to know what is the better type to be used and why? I heared that SS is stronger, but I need to know good and enough technical information. The will have much less resistance to pitting, but it will have better stress corrosion cracking resistance.

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