Stainless 440C is a high-carbon martensitic stainless steel. m The high carbon content in 440C provides high hardness and strength. Both annealed AISI 416 and hardened AISI 440C are iron alloys. 440C Martensitic Stainless Steel Suppliers, Martensitic Stainless Steel, Martensitic Stainless Steel Manufacturers ball bearings and roller bearings. [2], ( Heat Treatment Practice. Hardness Rockwell (HR C) Impact Charpy V (J) Annealed * 758 448 14 269HB max # - 204 2030 1900 4 59 9 260 1960 1830 4 57 9 316 1860 1740 4 56 9 371 1790 1660 4 56 9 * Annealed properties are typical for Grade 440C ASTM A276 annealed condition. Also Know, what is the easiest stainless steel to heat treat? 440c, S4404, 1.4125 stainless steel supplies available Ex-Stock from Intoco steel suppliers. It is usually heat treated to reach hardness of 58–60 HRC. However, as in motor shaft applications, under quenching and tempering conditions, 4340 steel typically use high preheating in low hydrogen processes. It is a bearing steel, and used in rolling contact stainless bearings, e.g. 440C is very similar to the 440B grade but with a slightly higher carbon content. 190 Kelly Road It is usually heat treated to reach hardness of 58–60 HRC. See the chemical composition and physical properties of AISI 440C Annealed, find alternative materials, and connect with suppliers. Stainless steels are high-alloy steels which have high corrosion This results in a stronger more durable product. In this section, we’re going to compare our steel with other steels, and for this, I use four criteria; Edge Retention, Corrosion resistance, Ease of Sharpness, and Toughness, and I use a scale or note from 1 to 10. They have a moderately high 95% of their average alloy composition in common. Hardening — Grade 440 stainless steels are heated at 1010 to 1065°C, then quenched in air or oil. When blanking cutlery parts from annealed raw material stock, ATI 410, ATI 420 alloys and their higher carbon versions (ATI 410HC and ATI 420HC) will usually exhibit hardness, yield strength, and tensile strength that are low enough for fine blanking purposes. Annealed Material: Preheat to 600/800F. Alloy 440C is relatively easy to machine in the annealed condition. Penn Stainless Products 440C is a mid-range Stainless Steel from the 440 Series (440 A, 440B and 440C) high in carbon (Has more than 1%, which makes the highest carbon steel of the 440 series), it offers excellent wear resistance and corrosion resistance, used for budget and mid-range knives. A half-full bar means it's 50% of the highest, and so on. 440C has the highest strength, hardness, and wear resistance of all the commonplace 440-series stainless alloys with high carbon content and moderate corrosion resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Sign up below for our newsletter. ASTM A276 standard grade 440C stainless steel is a high carbon martensitic stainless steel. Material Notes: Fe-17Cr-1Mn-1Si-0.75Mo-1.1C. Immediately temper at 150-370°C to obtain a wide variety of hardness values and mechanical properties as indicated in the accompanying table. μ If welding is necessary pre-heat at 250°C and follow welding with a full anneal. After heat treatment, it is capable of attaining the highest strength, hardness and wear resistance of all stainless alloys. 440C achieves the highest hardness and wear resistance of any stainless steel currently available. Stay up to date with the latest from Penn Stainless. 440C (UNS designation S44004) is a martensitic 400 series stainless steel,[1] and is the highest carbon content from 400 stainless steel series. This grade is magnetic at all times. Chips are tough and stringy so chip breakers are important. Oil quenching is necessary for heavy sections. Annealing – Full anneal – 850-900°C, slow furnace cool to about 600°C and then air cool. Hardening – Heat to 1010-1065°C, followed by quenching in warm oil or air. 2 The annealed hardness will depend on thickness. The high hardness and moderate corrosion resistance make 440c suitable for knife blades, medical instruments, Read more about 440C Bar Martensitic stainless steels are optimised for high hardness. A full bar means this is the highest value in the relevant set. … 440C can be oil quenched to achieve maximum hardness. It possesses good corrosion resistance, particularly in the hardened and tempered condition. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts. Compared to austenitic grades, 440C has moderate corrosion resistance, comparable to 304. Emergency Order: 267-374-6463, Copyright ©2021 Penn Stainless • Privacy Policy. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts. To harden stainless steel 440C heat to 1010-1070°C, fully soak and quench in warm oil or air cool. (0.762 mm) will tend to have lower as-annealed hardness. The corrosion resistance of grade 440C approximates that of grade 304 in many environments. 440C grade provides good wear resistance combined with moderate corrosion resistance in mild environments and has excellent hardenability. Sub-critical Annealing – 735-785°C and slow furnace cool. Grade 440C stainless steel is a high carbon martensitic stainless steel. 440c Martensitic Stainless Steel Characteristics. If you know what you need, you can quickly get a quote here. They are a combination of martensitic and austenitic steels. To weld this alloy, it should be preheated to 260°C(500°F) and post weld treated at 732-760°C (1350-1400°F) for 6 hfollowed by slowly cooling in the furnace to prevent cracking. Type 440C is a martensitic stainless steel with high carbon and chromium content. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. 440c steel composition Despite this carbon content, the chromium content is sufficient to retain its stainless characteristics. Best resistance in the hardened and tempered and passivated condition. Not recommended for use in temperatures above the relevant tempering temperature, because of reduction in mechanical properties by over-tempering. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such … This material will achieve the highest hardness of the available hardenable stainless steels. Penn Stainless inventory now includes Alloy 440C (UNS S44000) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products. West Yorkshire Steel are suppliers of 440C stainless steel in round bar, diameters. Home / Resources / Product Information / Stainless Grades / 400 Series Stainless / 440C Stainless Steel. This grade can be *cycle annealed by heating to 1600°F, holding two hours, cooling to 1300°F, and holding four hours. Stress Relieving Annealed Material: Heat to 1200/1250F, hold two hours, cool in still air. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. If these grades are hardened machining becomes more difficult and probably impossible. Another group of stainless steels are precipitation-hardened steels. A smooth polished surface also assists. Grade 440C stainless steel is a high carbon martensitic stainless steel. 440C is a high carbon straight chromium high hardenability martensitic stainless steel, generally supplied in the annealed condition with a maximum Brinell hardness of 269 (Rc29) or annealed and cold drawn with a maximum Brinell hardness of 285 (Rc31).Characterised by good corrosion resistance in mild domestic and industrial environments, including fresh water, organic materials, mild acids, various … In the hardened condition this material has a martensite + carbide structure. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Grade 420 filler will give a high hardness weld (although not as high as the 440C), but 309 or 310 will produce soft welds with higher ductility. ASTM specs, color codes, stainless grades, and other useful product resources and downloads. Machining of the alloy is much more difficult when hardened. 3 The heat treated hardness are data from internal testing of hardenability to meet various industry specifications or for information. It has one of the highest attainable hardnesses of the corrosion and heat resisting grades. It is also used to make knife blades. Typically used for molds, bearings, turbine components, aircraft structural parts, medical instruments, and cutlery Material with a thickness less than 0.030 in. m 440C Stainless steel is a type of modern steel and famous for its high corrosion resistant, wear resistance, strength and hardness qualities, among all the stainless alloys, capable of attaining (after heat treatment) the highest hardness (60 HRC). Tempering in the range 425-565°C is to be avoided because of reduced impact resistance and corrosion resistance. 440C is a 400 series stainless steel, and is the highest carbon content from 400 stainless steel series. ), Learn how and when to remove this template message, "440C Stainless Steel Products and Specifications - Penn Stainless Products | Penn Stainless Products", "AISI 440C Knife Steel Composition Analysis Graph and Information Details", Association of Licensed Automobile Manufacturers, Engineering Societies' Building and Engineers' Club, https://en.wikipedia.org/w/index.php?title=440C&oldid=995727201, Articles needing additional references from August 2013, All articles needing additional references, Creative Commons Attribution-ShareAlike License, This page was last edited on 22 December 2020, at 15:47. 440C is a hardenable chromium steel. Subsequently, question is, how hard can 440c get? As a martensitic stainless steel, 440C is magnetic and can be hardened by heat treatment. 440C is a martensitic stainless steel with relatively high carbon content resulting in good hardness and wear resistance. The manufacturing specification for Alloy 440C is AMS A276. Typical annealed hardness: 217/255 BHN. The steel may be cooled in air if desired. The high hardness of 4340 alloy steel requires that the material be welded in the annealed or tempered state and then heat treated to resist martensite formation and cold cracking. Phone: 215-536-3053 {\displaystyle \mu m/m} * Annealed properties are typical for Condition A of ASTM A276# Brinell Hardness is ASTM A276 specified maximum for annealed 440A, B and C. Slightly softer and more corrosion resistant grade needed, High machinability required, with same hardness and hardenability as 440C, Lower strength and hardness needed than any of the 440 grades, Higher machinability required, and the much lower hardness and strength is still adequate. 440C, also known as 1.4125 and 4125, is a high-carbon martensitic stainless steel. It has good resistance to the … Sub-critical annealing is carried out at 735 to 785°C, followed by slow furnace-cooling. Brinell Hardness: Alloy 440C: Hardened 1900°F, oil quench, tempered 600°F: 1896: 1965: 2: 10: 580: Availability Alloy 440C is available in Bar (Flat, Hexagon, Round, Square), Wire, Billet, Rod. Hot off the presses from the world of stainless steel and manufacturing. It is a bearing steel, and used in rolling contact stainless bearings, e.g. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts. The material is magnetic in all conditions. 440C is a high carbon straight chromium high hardenability martensitic stainless steel, generally supplied in the annealed condition. With correct heat treating, it can reach 58-60 HRC, and is typically used in bearings, ball screws, and other rolling contact applications. 440C Martensitic Stainless Steel (UNS S44004) Categories: Metal; Ferrous Metal; Martensitic; Stainless Steel; T 400 Series Stainless Steel. Quakertown, PA 18951, Toll Free: 1-800-222-6144 It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Annealed AISI 440C is AISI 440C stainless steel in the annealed condition. Cleveland, OH; Chicago, IL; Charlotte, NC; Atlanta, GA; Tampa, FL; Houston, TX; Los Angeles, CA; Seattle, WA. with a maximum Brinell hardness of 269 (Rc29) or annealed and cold drawn with a maximum Brinell hardness of 285. Oil quenching is usually carried out for heavy sections. Otai steel supplies reliable quality of 440c steel materials. There are 31 material properties with values for both materials. It is usually heat treated to reach hardness of 58–60 HRC. Based on their crystalline structure, they are divided into three types such as ferritic, austenitic, and martensitic steels. It is particularly suited to applications such as valve parts and bearings. / Properties with values for just one material (3, in this case) are not shown. Annealing — Grade 440 stainless steels are full annealed at 850 to 900°C, followed by slow furnace-cooling at about 600°C and air-cooling. The graph bars on the material properties cards below compare annealed AISI 440C to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). Grade 440C stainless steel is not welded because it can be easilyair hardened. 440C (UNS designation S44004) is a martensitic 400 series stainless steel, and is the highest carbon content from 400 stainless steel series. It is resistant to fresh water, steam, crude … For all stock availability contact Sales. Welding Use type 440C or 420 filler material. Good resistance to the atmosphere, fresh water, foods, alkalies and mild acids. Hardened Material: Heat to 25F below original tempering temperature, hold two hours, cool in still air. We are also a very large stockholder of hot work tool steels, stainless steels and super-duplex grade in round bar and plate / sheet form. Our main stainless inventory and processing center is located in Quakertown, PA. Take advantage of our other mill depot stocking locations in: Be careful not to overheat or full hardness will not be obtained. Stainless steels are high-alloy steels which have high corrosion resistance compared to other steels due to the presence of large amounts of chromium. For those applications where superior machinability is desired and where slightly lower corrosion resistance is … Maintain above 600F during welding. # Brinell Hardness is ASTM A276 specified maximum for annealed 440A, B and C, hot finished. CORROSION RESISTANCE AK Steel Type 440A provides good corrosion resistance in the hardened and stress relieved condition. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. 440C should be annealed for maximum softness by thorough soaking at 1650°F for six hours followed by a furnace cool. Tempering in the range 590-675°C results in lower hardness (the product become machinable) and high impact resistance. In the annealed condition this grade is relatively easily machined; approximately the same as for high speed steel.
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