Jul 28, 2017 · Stainless 316 contains more nickel than stainless 304, while 304 contains more chromium than 316. Stainless 304 usually consists of 18% chromium and 8% nickel. Stainless 316 is made up of 16% chromium, 10% nickel and 2% molybdenum. The two steel grades are comparable in appearance, chemical makeup and characteristics. ATI 316, ATI 316L, ATI 317, ATI 317LATI 316 and ATI 316L alloy (24.2) is better than that of ATI 304 alloy (PRE N=19.0), reflecting the better pitting resistance which ATI 316 (or ATI 316L) alloy offers due to its Mo content. ATI 317 (and ATI 317L) alloy, with 3.1% Mo and PREN=29.7, offers even better resistance to pitting than the ATI 316
This is accomplished by heating annealed material to a much higher temperature (1950° F/1065°) and quenching as rapidly as possible. This is a hardening treatment, not annealing. To improve toughness, these alloys are then tempered by re-heating in the range of 300° - 1000° F (150° - 530° C). Alloys that are stabilized using titanium or PWHT For Stainless Steel (304/316)Feb 21, 2009 · Not generally as stress relief. There might be some argument for 316, given the way Mo is supposed segregate. But I suppose in order to justify it the design would have to be cuttin it pretty close in regards to the service it will be used for. Its quite rare to do it. Speedy Metals Information for 303 Stainless Steel PlateIt is the most readily machinable of all the chromium-nickel stainless grades and has good corrosion resistance, although less than other chromium-nickel grades, such as 304 or 316. It is non-magnetic in the annealed condition and not hardenable by heat treatment. Tensile strength and hardness can be increased by cold working.
416 Stainless Steel. For most machined parts, 416 and 416 Se are usually supplied in the cold-finished condition. Brinell Hardness Max. Annealed & Cold Finished Up to 1/2" inc. Over 1/2". Types 416 and 416 Se have excellent machinability. Types 416 and 416 Se provide good surface finishes. Welding Types 416 and 416 Se requires special handling. Stainless Steel Type 316Tiaustenitic stainless steel. It is also known as DIN/EN designation No. 1.4571. The Type 316 alloys are more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels such as Type 304. They also offer higher creep, stress-rupture and tensile strength at elevated temperature. Stress Relief - Heat Treat Doctorstructed of stainless steel. The corrosion resistance in these alloys is primarily a function of stress relief temperature. Stress relief at temperatures below 750°F (400°C) is an acceptable industry practice, but results in only a modest level of stress reduction. Stress relieving
Jun 14, 2006 · recommended that a stabilized stainless steel (e.g. 321 or 347) or an extra-low-carbon type (e.g. 304L or 316L) be used, particularly if extended stress relief times are required. Stress relieving reduces residual stresses, avoids stress corrosion cracking, improves notch toughness, and improves dimensional stability in service. Full solution treatment