Types 316 (UNS S31600), 316L (S31603), 317 (S31700) and 317L (S31703) molybdenum-is stainless steels austenitic more resistant to general corrosion and pitting / crevice corrosion than the conventional chromium-nickel stainless steels austenitic such as 304. Type of alloys also offer higher creep, -strus-to rupture and tensile strength at elevated temperatures. In addition to corrosion resistance and excellent strength properties, the Types 316, 316L, 317 and 317L alloy Cr-Ni-Mo also provide the excellent fabricability and formability which are typical of the austenitic stainless steels.
Applications include for Types 316 and alloy 316L compounds acetic acid, vats brandy, products corn screening equipment, fasteners, kettles for cooking ketchup, processing equipment, pharmaceuticals, industrial parts phosphate, processing equipment photographic film, pitting-corrosion resistance, equipment pulp and paper processing, smokestacks, textile finishing equipment, textile mill Kiers, water softener tanks, wire cloth and screens (industrial) and yeast tubes.
There are 316 types, 316L, 317 and 317L more resistant to atmospheric and other mild types of corrosion than types 302, 304 and 304L. In general, the media do not corrode Types 302, 304 and 304L, will not attack the grades of molybdenum in them. One exception known highly oxidizing acids such as nitric acid to the molybdenum-stainless steels are less resistant.
Alloy is 316 / 316L are molybdenum-austenitic stainless steel. The nickel and molybdenum allows higher content in this grade corrosion resistant properties better overall interpretation than 304, especially for pitting and crevice corrosion in chloride environments. Additionally, Alloy 316 / 316L provides an elevated temperature tensile, creep and stress-rupture excellent strengths, as well as outstanding formability and weldability. 316L is the low carbon version of 316 and more it is immune from sensitization; therefore, it is often used in heavy gauge welded components.
-Food preparation equipment, especially in chloride environments
-Chemical processing, equipment
-Laboratory benches and equipment
-Rubber, plastics, pulp & paper machinery
-Pollution control equipment
-Boat fittings, value and pump trim
-Pharmaceutical and textile industries
-Condensers, evaporators and tanks
-Generally more resistant than 304 in range of atmospheric environments and many corrosive media due to the increased chromium
and molybdenum content.
-Subject to pitting and crevice corrosion in warm chloride environments, and to stress corrosion cracking above about 122°F (50°C).
-Considered resistant to potable water with up to about 1000mg/L chlorides at ambient temperatures, reducing to about 500mg/L at
-Usually regarded as the “marine grade stainless steel” – but is not resistant to warm sea water.
-Type 316/316L is somewhat more difficult to machine than Type 304 because of its toughness.
-316/316L machines with chip characteristics that are tough and strong.
-Chip breakers and curlers are advised.
-As large a tool as possible and great amounts of cutting fluid should be used.
-Heavy positive feeds at low speeds should be considered since 316/316L work hardens rapidly.