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The four hundred series is vulnerable to rust and corrosion under some situations. Common grades of 400 Series stainless steel A commonly used ferritic stainless steel is AISI 430 which offers great corrosion resistance, rivaling that of the 304 steel. Austenite is a high-temperature phase of plain steel, which recrystallizes into ferrite/pearlite around 1425F (depending on chemistry), below which ferrite becomes the more stable phase. The 400 series steels tend to be used in agricultural equipment, gas turbine exhaust silencers, hardware, motor shafts, and more. 17-4 PH and 17-7 PH steels contain 17% chromium and 4% or 7% nickel, respectively. Stock removal controllable to .0001 of an inch Polishing Limitations Excellent polishing of all 300 Series Stainless Steel Attributes Non-toxic, non-flammable. Stainless steels' main categories are austenitic (200 and 300 Series), ferritic (400 Series . This alloy exhibits superior resistance to stress-corrosion cracking in boiling 20-40% sulfuric acid. The 400 series of stainless steels - the Martensitic and Ferritic Grades - whose principle alloying element is Chrome, some of which can be hardened using heat-treatment. We stock various types of stainless steel, such as #304, 303S, and 316. Austenitic and ferritic stainless steels have low carbon levels that are not hardenable by heat treating. This family of stainless steels displays high toughness and impressive resistance to elevated temperatures. The 3 major types of Stainless Steel, Austenitic, Ferritic, and Martensitic are defined based on their crystalline structure: . History 2.4 400 Seriesferritic and martensitic chromium alloys 2.5 500 Seriesheat-resisting chromium alloys 2.6 600 Seriesoriginally created for proprietary alloys (which are no longer given SAE grade numbers)[10] 2.7 900 seriesaustenitic chromium-molybdenum alloys 3 Stainless steel designations table 4 High-strength low-alloy steel 5 See also The 400 series of stainless steels have a higher carbon content, giving it a martensitic crystalline structure that provides the end product with high-strength and high-wear resistance. the 400 series generally has lower pitting and crevice corrosion resistance compared to austenitic, nitinol, cobalt-chromium and titanium alloys which is particularily important in when. Request. STAINLESS STEEL COMPARATOR STAINLESS STEEL COMPARATOR WELCOME TO AK STEEL'S FAMILY OF STAINLESS STEELS All 200 and 300 series steels are austenitic, and contain 15% to 30% chromium and 2% to 20% nickel for enhanced These steels of the 400 series usually contain a minimum of 11.5% up to 18% chromium. For price consultation, contact us. Chromium content range appears to be 18-30% for 300 series and 11-12% for 400 series whereas the carbon content is higher in 400 series. The 400 series stainless steel Ferritic Alloys are magnetic and, like austenitic stainless steels, cannot be hardened. The 300-series steels have an "austenitic" metallic grain structure while 400-series have "ferritic" or "martensitic" structures. 17-4 stainless is a . Unlike ferritic stainless steels in the 400 series, martensitic stainless steels may be toughened with heat treatment, offering excellent strength and high wear resistance. Martensitic or 400 series stainless steels are easier to machine, however, they are not as corrosion resistant so they are easier to etch. According to worldsteelprices.com, during April of 2014, the Global Composite Carbon Steel price was $713/ton, where the Global Composite Stainless Steel 304 price was $2,778/ton. What Is The Difference Between 300 And 400 Series Stainless Steel the 300 series stainless steels are austenitic stainless steels with non-magnetic properties. Grade 416 is free machining and is the most easily machined stainless steel. Metallurgical Structure. If you're going to buy high quality 200 300 400 series austenitic stainless steel sheets in coil in stock, welcome to get more information from our factory. Grade 416 can be hardened similarly to other 400 series stainless steels. No chromium compounds or halogens. . The AISI numbering system: namely 200, 300, and 400 Series numbers. Austenitic stainless steels tend to work harden at a rapid rate, but the cold working rate of 400 series stainless steel is slightly higher than that of the plain carbon steels. These steels contain approximately 11% more chromium than the 300 series, providing high strength and wear resistance but a greater susceptibility to corrosion than 300 steels. They have have 17% to 19% chromium, 8-10% nickel, manganese, carbon, sulfur, phosphorus and silicon in the composition. . Annealing not only allows . . Carbon content is low. Austenitic stainless steels generally fall into one of three categories, either the chromium-nickel stainless steel of the 300 series, the manganese-chromium-nickel stainless steel of the 200 series, or certain specialty alloys. This means that the microstructure of both classes differ from each other and so the mechanical and properties will vary as well. This is the major difference between 300 and 400 series stainless steel; 300-series grades contain enough nickel to stabilize austenite at room temperature and hence are termed "austenitic" grades. Austenitic stainless steel: The chromium content is more than 18%, and it also contains about 8% nickel and a small amount of molybdenum, titanium, nitrogen and other elements. Ferritic stainless is used in cases where resistance to corrosion is key. . Sparks: Spark identification is to grind stainless steel on a grinder and observe the sparks. COMPARATOR - AK Steel. We're well-known as one of the leading 200 300 400 series austenitic stainless steel sheets in coil manufacturers and suppliers in China. Passivation of 400-Series Stainless Steel. The 100 through the 300 series are all various grades of austenitic stainless steel . stainless steel is a name given to any steel that is stainless. With sufficient quantities of nickel, stainless steel remains austenite at room temperature, creating the austenitic steels. They can be strengthened to higher hardness than 400-series grades by an aging method similar to that of aluminum alloys. The 400 series is susceptible to rust and corrosion under some conditions. Bright Annealing All grades of stainless steels can be bright annealed in highly reducing controlled Welding of 300 Series Stainless Steels The 300 Series is composed of two types of material: those which contain ferrite and austenite; and those which contain . Another point of distinction between the two series is that stainless steel grades that belong to the 300 series fall under the austenitic class, while grade 400 belongs to the martensitic class of stainless steels. 416 is another popular grade. Alloy 20 (Carpenter 20) is an austenitic stainless steel possessing excellent resistance to hot sulfuric acid and many other aggressive environments which would readily attack type 316 stainless. Differences between the alloys are slight but deliberate. Series Grade; 300 Series: 301 - 302 - 303 - 304/L - 304H - 316/L - 317L - 317LMN - 321 - 321H - 347 - 347H -309 - 309S - 310 - 310S - 310H - 330: . However, ferritic stainless has poor weld-puddle fluidity, making it challenging to weld. This in combination with excellent formability, resistance to wear, and strength at temperature make them common materials of construction within piping systems. Austenitic grades tend to be susceptible to sensitization of the heat-affected zone and hot cracking. However, they do tend to have higher strength. Ferritic wrought alloys (the AISI 400 series) contain from 10.5 to 27% chromium. Next in this series will be the Martensitic stainless steels. The 410 grade is the base grade and also the most commonly used one. Ferritic Series (400 Series) Martensitic Series Duplex Series Austenitic Series (300 Series) This stainless steel is the most widely used of all its kinds. They have magnetic properties, too, offers good ductility, tensile-property stability, and resistance to corrosion, thermal fatigue, and stress-corrosion cracking. They are: 1. Ferritic Stainless Steel This group of 400-series steels contains 10.5%-20% chromium for corrosion protection and resistance to scaling at high temperatures. Bobco Metals Los Angeles, CA 866-267-8335 Request For Quote View Company Profile Grade 440A can be hardened up to 56 RC. They do not contain nickel. Satin to "mirror bright", depending on polish time and temp Polishing Uses 400 Series Martensitic Stainless Steel. 301, 304, 316) and precipitation hardened stainless (e.g. Read More 410 Stainless Steel Sheet - Slice of Stainless Home #400 400-Series Martensitic Stainless Steel / Multipurpose Electropolishing Solution Finish Brilliant finish. The absence of nickel reduces material cost. Austenitic stainless steel has austenite as the primary microstructure. Some of these grades respond to a magnet much like ordinary steel. Grades 304 and 316 are both part of this series and the most commonly used varieties of stainless steel. SS439 has greater resistance to corrosion and improved high-temperature stability. 400 series are used in agriculture equipment, turbines, petro-chemicals, fasteners, and heat exchangers. We also stock Accuracy and Bearing Quality stainless round bar in 303, 304 & 316/L. Typical applications include shafts, pumps, fasteners, and piping in seawater and equipment for processing chemicals, food, and dairy products. The effectiveness of this low- temperature nitriding treatment is in reducing the friction and wear. What Is The Difference Between Stainless Steel And Duplex Stainless Steel. Austenite is a solid solution of iron and carbon that comes into existence above the critical temperature of 723C. For types contains up to 0,4% carbon, are generally used in pumps, valves, shafts, fittings, flanges and others which carbon contents are below 0,4% are used in generally for cutting tools and other applications that require wear resistance. Ferritic . The 400 series are very magnetic (martensitic). For example, alloy 316 fillers are generally welded to alloy 316 base items. AISI 304 stainless steel around 8 %-10% nickel content; molybdenum improves resistance to localized corrosion in chloride-containing environments have good corrosion resistance but are susceptible . Difference between 300 and 400 Series Stainless Steel; Difference between 204 and 304 Stainless Steel; Difference between Ferrite and Austenite Steel; 400 series stainless steel Belongs to ferrite stainless steel and martensitic stainless steel. Also hardens rapidly during mechanical working. Austenitic or 300 series stainless steels typically have higher chrome as well as a significant amount of nickel (e.g. 400 series is formed by ferritic and martensitic stainless steel. Additional heat treated conditions can be produced upon request. Actually there are over 50 stainless steel alloys. These are corrosion resistant stainless steels and are one of the . Type: UNS: Tensile (ksi) min: Yield (ksi) min: Elongation min: Hardness (Brinell) max: Hardness . While they do demonstrate the level of corrosion resistance that is typical of stainless steels in general, they are less resistant to corrosion than 300 series products. These include the common 303, 304, and 316 alloys. Unlike SAE 200 and 300, 400 . Type 301highly ductile, for formed products. They are also difficult to weld. The 300 series austenitic stainless steels are a set of iron-based chromium-nickel alloys designed to resist corrosion. Grade 440A has good strength and excellent hardness. Often called "ferritic" or "straight chrome" grades, 400-series ferritic alloys cost less compared to alloys with a higher nickel content (e.g., a 304 "18-8" austenitic alloy). The most common austenitic stainless steel is Type 304. 304 stainless steel - 18% chrome, 8% nickel) which makes them harder to etch. 400 Series stainless steels do not contain high nickel like austenitic types. 3. 18-8 stainless is another name for 304 stainless (18% chromium and 8% nickel). Stainless steel costs upwards of 3.8 times as much as carbon steel. Austenitic - these stainless steel have a face-centered crystalline structure. 400 Series Stainless Steel - Texcellent Grade 416 stainless steel is a martensitic stainless steel similar to type 410. The martensitic 400 series of stainless steel is more challenging to laser weld than the austenitic and ferritic grades. For instance PM stainless steel parts (both 300 and 400 series) are used in door locks, irrigation equipment, safety devices, pneumatic and hydraulic applications, waste disposals and aircraft tray tables. Therefore, the main purpose of austenitic stainless steel heat treatment is not to change the mechanical properties, but to improve corrosion resistance. The high carbon enables the material to be . 200 and 300 series stainless steel are austenistic, which means they are not magnetic but 400 is most commonly you'll be able to tell by the application: 200-300 are used in things that dont need to be hard, but need to be corrosion resistant, like sinks or other kitchen appliances All values shown indicate the maximum percentage unless . All chrome steel is magnetic besides austenitic chrome steel which is definitely 300 sequence stainless such as 304 and 316. In 400 series stainless, we stock 410HT and 416HT. 300 series austenitic stainless steel. 400-Series Stainless Steel Ferritic and martensitic 400 series stainless steels do not contain nickel additions, so an austenitic structure is not retained at room temperature. Austenitic | Martensitic | . A non-stabilized austenitic stainless steel, 904L grade products contain copper as part of the alloy.