As said, molybdenum makes the difference. Stainless steels are known for their resistance to corrosion. Still, neither of those options is best suited when something reliable against abrasives and hard wear is sought. Stainless steels are suitable for such an environment. The last reason for using stainless steels is aesthetics. This is due in part to the addition of molybdenum. With good formability, 304 stainless steel can be readily welded by all common methods. The quickness of this process depends on the amount of chromium in the steel. Therefore, both grade 304 stainless steel and grade 316 conform to the American standard. A few percentages this way or that in chromium and nickel. Although seemingly nonexistent, it is highly durable and non-reactive. What is the temperature of operation? 316 costs costs more than 304, but it … The combination with strength and low maintenance make them a great fit for a wide range of applications. AISI 304 Stainless Steel vs. AISI 316 Stainless Steel. Both AISI 304 stainless steel and AISI 316 stainless steel are iron alloys. Properties and Applications, The demand for stainless steel is increasing at a whopping 5% each year. Some of the alloys have a suffix L added to them. The need for annealing the joints is eliminated. Corrosion can eat away at metal and your construction’s load-bearing capabilities will diminish over time. 304 stainless steel is commonly used in the manufacture of various items including sinks, pots, pans, tables, and the like. 316 Stainless Steel This product offers high tensile strength. Immediate pricing and short lead times all over the UK. Typical room temperature … Still, neither of those options is best suited when something reliable against abrasives and … When it comes to 316 stainless steel, you can expect better corrosion and pitting resistance to chlorides than 304 stainless steel and higher levels of strength at elevated temperatures. When it comes to 304 stainless steel vs. 316 stainless steel, while both are good for corrosion resistance, strength, welding, and heat resistance, 316 stainless steel gets the slight edge in all these categories due to variation in alloying elements. For these applications, Type 316 is the answer. ©2020 Ryerson Holding Corporation. Basically, they indicate the steel’s structure. A Header Purchase Order Number is included in your barcode and may override previous purchase orders in your cart, Check out the May Monthly Market Report from Ryerson. Much more so than coated structural steels, as the coating is more easily damaged in this kind of a situation. By browsing our website, you consent to our use of cookies and other tracking technologies. Properties with values for just one material (2, in this case) are not shown. Why use AISI 316L then? And unfortunately, commonly available stainless steel such a 304 (A2) and 316 are normally on the weaker side when it comes to tensile strength. Let's look at the metal characteristics tale of the tape: The price of 304 and 316 grades can fluctuate based on the ebb and flow of the raw material cost. The same principles apply to AISI 304 and AISI 304L. But what do the grades of stainless steel mean? • Nickel - Increases strength and hardness without sacrificing ductility and toughness. If the conditions don’t warrant the need for AISI 316, it is cheaper to go with AISI 304. The welded joints there do not respond to corrosive environments as easily. Order your sheet metal fabrication online. There are 34 material properties with values for both materials. Chemical reactions still take place, but they don’t include iron. It is a highly heat-resistant grade, and offers good corrosion resistance to many chemical corrodents, as well as industrial atmospheres. Stop wasting time on admin! All Rights Reserved. Not all steels are made equal. In case of stainless steel, a protective layer forms itself. AISI stands for American Iron and Steel Institute. This is the main and clearest dividing line of the two stainless steels. Thus, a higher grade is better suited. If the layer gets damaged, it will repair itself. We can just look at some questions along with answers to aid you. Those include the aforementioned medical and food equipment examples. At the same time, surgical instruments and cutlery made from stainless steel are easy to clean and disinfect. Application of 304 Stainless Steel. What distinguishes Type 316 from Type 304 is the addition of molybdenum up to a maximum of 3%. In case of structural steels, you have to add a layer of protection by coating it. This results in a minor difference in strength, which is in favour of AISI 316. The former costs about 25% more than the latter. The flakes of rust begin to crumble, exposing more metal to the outside conditions. AISI 304 vs 316 stainless steel cost: Taking steel plates as an example, the cost of 316 is about 1.5 times the cost of 304. Fractory Ltd, Barclays Eagle Lab, Union, Albert Square, Manchester M2 6LW, Mechanical Properties of AISI 304 & AISI 316, Chromium is the secret to stainless steel, How chromium protects stainless steel animation, What is Stainless Steel? High temperatures accelerate corrosion. 316L stainless steel is the extra low carbon version of 316 stainless steel that helps avoid carbide precipitation due to welding. The two steel grades are comparable in appearance, chemical makeup and characteristics. At present, a wide number of industries…, Stainless Steel Finishes Explained - DIN & ASTM, Selecting the right stainless steel finish for your application is very important. What is your budget? High tensile steel is so-called because they have additional alloying ingredients that improve their tensile strength. Otherwise nature will do its own thing and iron starts to corrode by forming iron oxide. The ideal solution then is wear-resistant steels, like Hardox. The carbon content is held to 0.08% maximum, while the nickel content is increased slightly. While grade 304 stainless steel only has trace amounts of it, AISI 316 has considerably more. Stainless steels are divided into 5 families: austenitic, ferritic, martensitic, duplex (a mix of ferritic and austenitic) and PH – precipitation hardening (martensitic, semi-austenitic or austenitic). We use cookies and other tracking technologies to improve your browsing experience on our website, to show you personalized content and targeted ads, to analyze our website traffic, and to understand where our visitors are coming from. The stainless steel mechanical properties table shows that while the yield strength of AISI 304 and AISI 316 may be comparable to structural steels, they outperform the regular steels in tensile strength. The right finishing is…. a large variety of stainless steel finishes, Excellent corrosion resistance in normal or mildly aggressive environments, Great suitability for hygienic environments. Hopefully we managed to make your material selection process a bit easier. There are 34 material properties with values for both materials. 304 is the most common type of stainless steel. But the addition of alloy elements like molybdenum can make subtle, but important, differences: • Molybdenum - Increases strength, hardness, hardenability, and toughness as well as creep resistance, and strength at elevated temperatures. The stainless steel mechanical properties table shows that while the yield strength of AISI 304 and AISI 316 may be comparable to structural steels, they outperform the regular steels in tensile strength. Type 316 is also austenitic, non-magnetic, and thermally nonhardenable stainless steel like Type 304. The features of austenitic stainless steels are: The stainless steel mechanical properties table shows that while the yield strength of AISI 304 and AISI 316 may be comparable to structural steels, they outperform the regular steels in tensile strength. In some cases, avoiding rust can be a matter of a construction’s longevity. The European equivalents are 1.4301 and 1.4401, respectively. They are used everywhere from buildings and constructions to medical and food equipment. Stainless 316 contains more nickel than stainless 304, while 304 contains more chromium than 316. You can probably see why people usually choose to go with American standards here. 304 and 316 stainless steels are ferrous metals that are widely used when corrosion resistance is sought. You can also choose from a large variety of stainless steel finishes. The difference derives from molybdenum. What does it actually mean to you? 304 vs 316 Stainless Steel Cost. They still make for a great solution in difficult environments, providing long-lasting products in many fields. The second most widely used 316 grade stainless steel, compared with AISI 304, reduced chromium content, increased nickel content, and added 2-3% molybdenum. All this ends in piles of scrap metal. In 2019, its global production reached over 52 million tons. Stainless 304 usually consists of 18% chromium and 8% nickel. Still, there is a minor difference – L stands for “low” as in low carbon content. This variation offers the same corrosion resistance as 304 stainless steel, but with slightly lower mechanical properties. Let’s skip the structural differences for simplicity’s sake and move straight to how this structure affects the mechanical properties of materials.

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