Identification pipe size steel inches outside diameter inches iron pipe size schedule no. Difference between inconel and stainless steel 316 inconel vs stainless steel 316 inconel. The only downside to 304 stainless steel is that it slowly corrodes and will eventually show signs of wear and tear. Grade 301 stainless steel, with its higher carbon content 0. Service tests are most reliable in determining optimum material, and astm g4 is a recommended practice for carrying out such tests. The resistance of types 304 and 316 stainless steels to. Types 304 and 316 stainless steel are widely and successfully utilized in piping and equipment to handle fresh waters. Our products are stocked in the higher grade of type 316 ss and, in some products, type 304 ss as well.
You can also choose from iso, sgs, and bv 304 316 stainless steel price, as well as from jis, din, and astm 304 316 stainless steel price, and whether 304 316 stainless steel price is spiral welded, or efw. Its up to you though depending on how much you are comfortable spending and how long you plan to keep the vehicle. This compilation of stainless steel grade datasheets has been produced by atlas steels technical department as a companion to. For some industries, however, the cost is worth it. The following datasheet provides an overview of grade 304n stainless steel. Type 316 stainless steel is an austenitic chromiumnickel stainless and heatresisting steel with superior corrosion resistance as measured up to other chromiumnickel steels when exposed to many types of chemical corrodents. It is a modification of type 304 in which the chromium and nickel contents are lowered to increase the cold workhardening range. The study was carried out for aisi 304, aisi 316 and aisi 321 substrates using yb. The differing chemical makeups of 304 ss and 316 ss influence how each performs in a certain environment. The molybdenum is added to help oppose erosion to chlorides like ocean water and deicing salts. Differences between a358 and a312 erw steel tubes and. When it comes to applications with chlorinated solutions or exposure to salt, grade 316 stainless steel is considered superior.
The addition of the element molybdenum turns common stainless steel into a. Aug 08, 2018 marine grade stainless steel 316 is similar to stainless steel 304 in the composition of chromium and nickel, however it contains about 2 to 3 % of molybdenum in addition which greatly increases corrosion resistance of the steel. Its main function in stainless 316 is to help fight off corrosion from chlorides. Jan 08, 2018 the 304 stainless steel has good oxidation resistance in intermittent service up to 870 c and in continuous service up to 925 c. The molybdenum is added to help resist pitting and corrosion by most chemicals, and. Stainless steel grade 304n has better corrosion resistance than grade 302, and is mostly nonmagnetic in nature.
Though the stainless steel 304 alloy has a higher melting point, grade 316 has a better resistance to chemicals and chlorides like salt than grade 304 stainless steel. The two most common series of stainlesssteel fasteners are. For additional questions regarding grades of stainless steel or the use of type 304 ss vs type 316 ss in a specific application, please contact us today. In addition to this, the nickel content in type 316 stainless steel is higher than that in type 304 stainless steel. The addition increases corrosion resistance, particularly against.
As you can probably guess, it has the high est nickel content. Marine grade stainless steel 316 is similar to stainless steel 304 in the composition of chromium and nickel, however it contains about 2 to 3 % of molybdenum in addition which greatly increases corrosion resistance of the steel. Grade 316 is an austenitic grade second only to 304 in commercial importance. In this case, 304 stainless steel is the typical steel used in most nonmarine or hazardous environments where the extra cost of 316 stainless steel, which is more apt to those. While type 201 has the lowest resistance to corrosion, and type 304 is more resistant, type 316 has the most.
The lack of understanding that persists can be justified given the fact that on the surface, the two grades of stainless steel in question look extremely similar, if not identical. Jan 11, 2020 type 304l stainless steel is an extralow carbon version of the 304 steel alloy. Jun 25, 2015 316 stainless contains a fair amount of molybdenum to improve hightemperature mechanical stability and corrosion resistance in certain marine environments. In room temperature conditions, grade 301 stainless can take up to 120 ksi kilopounds per square inch. It is these alloying elements added to the iron base that makes stainless steel very different from carbon steel.
Pdf hightemperature corrosion of stainless steels aisi 316 and aisi 304 in. It has almost the same physical and mechanical properties as 304 stainless steel, and contains a similar material makeup. Type 304 stainless steel an overview sciencedirect topics. Stainless steel grades explained 304 vs 316 danver. The key difference is that 316 stainless steel incorporates about 2 to 3 percent molybdenum. A quick and easy to use request for quote form is provided for you to contact these 316 stainless steel manufacturers and suppliers. Type 316 stainless steel is an austenitic chromiumnickel stainless and heatresisting steel with superior corrosion resistance as compared to other chromiumnickel steels when exposed to many types of chemical corrodents such as sea water, brine solutions, and the like. The main differencebetween 304 vs 316 stainless steel is the composition and corrosion resistance, ss304 doesnt contain molybdenum while ss316 contains 23% molybdenum. The higher molybdenum content results in grade 316 possessing increased corrosion resistance. The main difference between 304 and 316 stainless steel is 316 ss has the addition of molybdenum. Test for difference between type 316 and 304 stainless steel. What is the difference between stainless steel 310 and. When we talk about stainless steels is important to know the differences between the two most commonly used types 304 and 201, each one has its own chemical composition as well as advantages and disadvantages, beside specific characteristics as hardness, corrosion resistance, welding, and appearance among others, each of these features is what makes each type ideal for some projects.
Obviously, this high nickel content makes type 316 the most expensive type of stainless steel banding. For exact od, id and wall download our pipe size chart pdf. The simple answer is 304 contains 1820% chromium and 810. Learn the difference between 304 and 316l stainless steel alloys in this brief tutorial from sanitary fittings. The addition of molybdenum provides pitting resistance in phosphoric acid, acetic acid and dilute chloride solutions and provides corrosion resistance in sulfurous acid. As 316 contains molybdenum, it has a higher resistance to chemical attack than type 304. They cannot be hardened by heat treatment, but their mechanical properties may be improved through various wrought processes such as cold heading and roll threading. Large selection of stainless steel pipe in 304 and 316 allys, seamless and welded. 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. Two kinds of stainless steel, aisi 304 and aisi 316, were chosen for the. Outwardly, 304 stainless steel and 316 stainless steel look very similar.
Sep 27, 2012 type 316 stainless steel is an austenitic chromiumnickel stainless and heatresisting steel with superior corrosion resistance as compared to other chromiumnickel steels when exposed to many types of chemical corrodents such as sea water, brine solutions, and the like. A major difference between 304 and 316 stainless steel is the chemical composition, with 316 containing a significant amount of molybdenum. Typical uses include exhaust manifolds, furnace parts, heat exchangers, jet engine parts, pharmaceutical and photographic equipment, valve and pump trim, chemical equipment. Aug 26, 20 we offer our clearview railing systems in both 304 and 316 grade stainless steel. Pdf corrosion resistance of the aisi 304, 316 and 321 stainless. Type 304 vs type 316 stainless steel sinks and faucets.
Whats the difference between 304 and 316 stainless steel. Wall thickness t inches inside diameter d inches 180. The dimensionless designator nps nominal pipe size has been substituted in this standard for such traditional terms as nominal diameter. Grade 304 stainless steel, by comparison, can only take up to 90 ksi of pressure before. It is important to discuss these variables for any application. Molybdenum is a chemical element used for the strengthening and hardening of steel. The difference between 304 and 316 stainless steel metal. Since molybdenum is a very expensive alloy addition, it. Both are nonmagnetic, austenitic, and nonhardenable through heat treatment. Type 316 is durable, easytofabricate, clean, weld and finish. Each of these stainless steel grades will resists corrosion, are quite durable, and are easily formed and fabricated. In fresh waters of up to mg l chloride content, type 316 is shown to be resistant to initiation of crevice corrosion in severe crevice geometries. Petroleum engineers steel products manualstainless and heat. Occasionally, conditions are encountered that cause localized attack, usually crevice corrosion, of these alloys.
Type 316 stainless steel in an environment of 25% phosphoric acid, and figure 3 shows effects of temperature on types 304 and 316 in very concentrated sulfuric acid. It increases the strength of stainless steel and also makes it more durable in. Stainless 316 contains more nickel than stainless 304, while 304 contains more. The most basic difference between the grades of steel is the presence of molybdenum in stainless 316. Tables of technical properties of stainless steels flat products. What is it that makes these grades the best allaround performance stainless steels. The difference between 304, 304l and 304h stainless steel when it comes to variations between 304 and 304l stainless steel, the most essential thing to note is the latters greater immunity to intergranular corrosion. This is particularly apparent for pitting and crevice corrosion in chloride. Since molybdenum is a very expensive alloy addition, it adds greatly to the overall cost of 316 versus 304. Iqs directory is a top industrial directory listing of leading industrial 316 stainless steel manufacturers and suppliers. Is 316 stainless steel worth the extra cost over 304. Type 305 is a chromium nickel austenitic stainless steel with a low rate of work hardening due to the elevated nickel content.
The 300 series stainless steel grades 304 and 316 contain nickel from 8 to 14% in addition to the chromium that must be present. The 300 series, which contains the most widely used types of stainlesssteel fasteners grade 304 and grade 316. The main difference between type 304304l and type 316316l is the addition of 23 wt% molybdenum in the latter. A discussion started in 2000 but continuing through 2018. Additional 316 stainless steel suppliers, stainless steel 304. Difference between 304 and 316 stainless steel valves. This low rate of work hardening makes this grade well suited for multistage deep drawing applications without process annealing where 304304l may suffer from cracking issues. When dealing with stainless steel materials, people often have a tough time differentiating between 304 grade stainless steel and 316 grade stainless steel.
These are often selected for projects because they feature high tensile strength and superior corrosion resistance due to the relatively high chromium and nickel content. The difference in their structure is primarily the addition of molybdenum to. The two steel grades are comparable in appearance, chemical makeup and characteristics. What is the difference between 304 and 316 stainless steel. The addition of molybdenum in stainless steel 316 provides better corrosion resistance compared to ss304 in highly. Used predominantly in kitchens, transport, hospitals, architecture, etc. Feb 26, 20 stainless steel grade 304 is the most commonly used stainless steel. Dock builders supply type 304 vs type 316 stainless steel. A wide variety of 304 316 stainless steel price options are available to you, such as welded, plate, and flat. Requirements for one grade of stainless over the other are often dependent on the application or environment. Difference between 304 and 316 stainless steel valves valve.
Given that type 316 stainless steel alloy contains molybdenum it has a considerable more resistance to chemical attack than 304. Aug 18, 2017 316 stainless steel is an austenitic chromiumnickel stainless and heatresisting steel with remarkable resistance to corrosion in comparison to other steels when exposed to the outdoor elements like sea water. Difference between 304 grade and 316 grade stainless steel. Type 304 vs type 316 stainless steel sinks and faucets by just. Stainless steel grade 304 is the most commonly used stainless steel.
Stainless 316 is made up of 16% chromium, 10% nickel and 2% molybdenum. The lower carbon content in 304l minimizes deleterious or harmful carbide precipitation as a result of welding. Austenitic stainless steel an overview sciencedirect. These 316 stainless steel companies can design, engineer and manufacture 316 stainless steel to your specifications and application need. Type 304l stainless steel is an extralow carbon version of the 304 steel alloy. Type 304 stainless steel is used in enclosures, storage tanks, pressure vessels and tubing or piping.