Corrosion characteristics of ss316l as bipolar plate. Ss 316l is an austenitic chromiumnickel stainless steel with superior corrosion resistance. Ss304 ss316 ss316l inoxidable sin costura evaporador tubos. Grade 316l stainless steel sheet comes in many types and thicknesses. S 316 l is a general austenitic grade with ranges of cr, ni. Type 316l is an extralow carbon variation of type 316 that eliminates harmful carbide precipitation due to welding. Outwardly, 304 stainless steel and 316 stainless steel look very similar. When you compare stainless steel 174 ph vs 316, it is obvious that 174 ph has higher hardening content. Both are nonmagnetic, austenitic, and nonhardenable through heat treatment. July, 2012 supersedes april, 2010 type 316 austenitic stainless steel is a commonly used alloy for products that require excellent overall corrosion resistance. Alloy 316316l resists atmospheric corrosion, as well as, moderately oxidizing and reducing. One exception, however, is in highly oxidizing acids such as nitric acid where stainless steels containing molybdenum are less resistant. Electrochemical methods, both potentiodynamic and potentiostatic, are employed to determine the corrosion parameters and the results show that corrosion resistance decreases with increasing h 2 so. Comparison of passivation behavior of ss316l with that of.
Both aisi 316 vs 316l stainless steel are molybdenum mo containing austenitic stainless steel grades. Stainless steels, thanks to their chemical composition, are metal alloys, which are naturally corrosion resistant aisi316l stainless steel, known as 1. Carbamide as the space holder with the composition of 95, 90, 85, 80, and 75 of weight percent wt. The carbon content is kept low while the steel making is optimised in order to improve the cleanliness properties of the steel. The urea 316l grade is a fully austenitic stainless steel which ferrite content is guaranteed less than 0.
Deterioration by clscc can lead to failures that have the potential to release stored energy andor hazardous substances. Typical uses include exhaust manifolds, furnace parts, heat exchangers. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride solutions and provides corrosion resistance in sulfurous acid. But even though it has less carbon, 316l is very similar to 316 in almost every way. Astm a240 grade 316l stainless steel sheet, sa240 316l. What is the family lean duplex ss lower nickel and no molybdenum 2101, 2102, 2202, 2304 duplex ss higher nickel and molybdenum 2205, 2003, 2404 super duplex 25chromium and higher nickel and molybdenum plus 2507, 255 and z100 hyper duplex more cr, ni, mo and n 2707. I know stainless steel 316l is used in pharmaceutical and medical environments, i would like to know if stainless steel 904l can be used as a substitute and if it matches fda and international standards the same as 316l does. Stainless steel 316l ss316l is the extralow carbon version of ss316 that minimizes harmful carbide precipitation during welding. Temco stainless steel wire ss 316l 26 gauge 100 ft nonresistance awg ga. While low carbon prevents sensitization, stabilized grades may. Chloride stress corrosion cracking in austenitic stainless. Types 316 uns s31600, 316ls31603, 317 s31700, and 317l s31703 are molybdenum bearing austenitic stainless steels which are more resistant to general corrosion and pittingcrevice corrosion than the conventional chromiumnickel austenitic stainless steels such as type 304. If i had a dollar for every time i get asked that question whats the difference between 304 vs.
The salient fea ture of austenitic alloys is that as chromium and molybdenum are increased to increase specific properties, usually corrosion resistance, nickel. Covered in thsi document are the physical and mechanical properties of 316l stainless. Another grade is named as f316, which is from astm a182 for forged parts only. In order to assis t the reader in this selection, euro inox makes the following tables of technical properties available. This is actually a low carbon version of 316 stainless steel. Difference between aisi 316 stainless steel and aisi 316l. The answer is yes, because this molybdenum is added to improve the corrosion resistance to chlorides like sea water. Pdf corrosion resistance of ss188 alloy, ss316l alloy. Corrosion behavior of ss316l in simulated and accelerated pemfc environments kai feng a,b, guosong wu b, zhuguo li a, xun cai a, paul k. Likewise, 302 gave way to the lowercarbon 304, for which the even lowercarbon 304l is commonly substituted and dually certi. Ss316 and 174 ph are one of the most important stainless steel grades. Chemical composition of stainless steels flat products mechanical properties of stainless. The dimensions of each specimen were measured and recorded. Srinivasan nishi engineers pvt ltd chennai india april 22 email.
The composition o f ss316l w as wt% 18cr, 12 ni, 2. The properties quoted below are typical of annealed 316 only, as strength. As i understand it, 316 l has lower carbon such that when welded the chromium carbide that forms does not deplete the chromium to the point where the corrosion of the stainless is deleteriously impacted. If you want to buy castings, pls indicate cf8m as material, otherwise you can adopt ss316. European equivalence to ss316l or asmeen dual rated material tvp materials 26 apr 06 22. Ss316 is defined in astm a240 and astm a276, its for plate, sheet, strip or stainless steel bars. What is the difference between ss304 and ss316 blogger. Stainless steel 304, ss 310s, ss 316 chemical composition. Chemical composition chemical composition as represented by astm a240 and asme sa240 specifications are indicated in the table below. Comparative study of mechanical properties of 316l stainless steel between traditional production methods and selective laser melting a thesis presented to the. Corrosion behavior of ss316l in simulated and accelerated. The selection of the appropriate stainless steel grade for each applic ation is the result of variou s considerations. However, no significant difference in the chemical composition of passive layer of ss316l could be observed. The main types of ss 316l sheets are perforated sheets, chequered plate, shim sheet, strips, coils, foils, flats and circles.
Pdf corrosion resistance of ss316l in artificial urine. From a chemical or scientific standpoint the answer would be that 304 stainless steel contains 18% chromium and 8% nickel while 316 contains 16% chromium, 10% nickel and 2% moly. Process environments that do not corrode alloy 304304l will not attack this grade. European equivalence to ss316l or asmeen dual rated. Aisi 316 vs 316l stainless steel, difference of ss316.
Specifically, the carbon quantity present in aisi 316l stainless steel must be. Stainless 316, 316l, 317, 317l united performance metals. Other areas such as heat treatment, welding, machining, hot and cold working, hardening, work hardening and applications are also outlined. The main difference between 304 vs 316 stainless steel is the composition and corrosion resistance, ss304 doesnt contain molybdenum while ss316 contains 23% molybdenum. F316 austenitic stainless steel related specifications astm a182 f316 astm a276 316 uns s31600 w. Ais1 and aci standard composition ranges for wrought and cast chromiumnickel stainless steels r american iron and steel institute classification of chromiumnickel stainless steels composition, y0 aisi type 201 202 301 302 302b 303 303se 304 304l 305 308 309 309s 310 310s 314 316 316l 317 d319 321 347 348 384. Stainless steel 316 is a chromiumnickel based steel that possesses increased levels of resistance against several substances, due to the addition of molybdenum in its composition.
Pdf on jan 1, 2018, vincent brigitta and others published corrosion resistance of ss188 alloy, ss316l alloy, gold18 carat and gold 22 carat in artificial saliva in the absence and presence of. The main difference between 316 and 316l stainless steel is the level of carbon content, weldability, corrosion resistance and mechanical properties. Stainless steel 316316l uns s31600 chemical composition physical properties. Typicalapplications heatexchangers pressurevessels chemicalcontainers foodpreparationequipment. Cost is very similar, and both are durable, corrosionresistant, and a good choice for highstress situations. The parts built from eos stainlesssteel 316l have chemical composition.
Chloride stress corrosion cracking clscc is one the most common reasons why austenitic stainless steel pipework and vessels deteriorate in the chemical processing and petrochemical industries. What is the difference between ss304 and ss316 stainless. From the above chemical composition chart we can see the main difference between ss304 and ss316 is that ss316 contains 2%3% molybdenum and ss304 has no molybdenum. Chemical composition of stainless steel ss304 chemical. The molybdenum allows ss 316 to be more resistance to corrosion overall, with specific resistance against chlorine pitting. Room temperature tensile properties minimum mechanical properties for annealed alloys 316, 316l and 317l austenitic stainless steel as required by astm specifications astm a2 and asme specification sa2 are shown below. Composition weight percent in most applications alloy 316316l has superior corrosion resistance to alloy 304304l.
374 867 774 1092 389 299 1310 618 1235 1384 585 1126 1527 780 1081 787 178 1480 794 780 399 886 539 232 1299 251 35 49 770 749 1397 325 1497 289 968 1393 1179 1073 456 265 404 1076 1079 745