Fyi, carpenter 20 is a generic name for the alloy carpenter calls 20cb 3 stainless, with the uns designation n08020. C276 alloy is an improved wrought version of alloy c in that it usually doesnt need to be solution heattreated after welding and has vastly improved fabricability. We are planning to use monel 400 for two different sulfuric acid lines of which concentrations are %5 and %95. Stainless steel selection guide central states industrial. Alloy 20, uns n08020, carpenter 20, 20cb3, incoloy alloy 20. The file contains 16 pages and is free to view, download or print. Corrosion resistant alloy 20, or carpenter 20, is available in pipe, pipe fittings, plate, sheet, bar, and more.
Isocorrosion diagram for ultimet alloy in hydrochloric acid. Isocorrosion chart for carpenter 20cb3 stainless in sulfuric acid. Solutions for coupons 625 and c4 were at 102c, while c276 and c22 were at 125c. The experimental alloys containing 3 per cent copper by mass could not be successfully.
Isocorrosion diagram for ultimet alloy in sulfuric acid. A nickelironchromium grade, alloy 20 is ideal for a wide range of corrosive environments. Guide to selecting in this book, select from stainless steels, superior corrosionresistant alloys, hightemperature alloys. This type of behavior has been observed with a series of alloys dynamically tested in accordance with nace standard tm0270 see figures 15 and 16. Corrosion resistance of alloy 20 cb in sulfuric acid. Carpenter 20 cb3 stainless steel uns n08020 download datasheet. Intergranular corrosion resistance of carpenter 20cb3. Shaped, flat, square, round, fine wire, plated and bare wire astm a240, astm a265, astm b 463, astm b471, astm b 472, astm b 473, astm b475 alloy 20 cb 3 alloy description. The resistance of this alloy to boiling sulfuric acid is shown in figure 35. Bar, wire, sheet, plate, coil, fasteners and forgings. Carpenter alloy 20cb 3 uns n08020 ni 35, fe 37, cr 20, cu 3. We are a stockist and supplier of carpenter 20cb3 alloy 20 round bars, hex bars, flanges, bolts, nuts and washers. Astm a240, astm a265, astm b 463, astm b471, astm b 472, astm b 473, astm b475 alloy 20 cb 3 alloy description alloy 20 cb 3 is an austenitic stainless steel possessing excellent resistance to attack by sulfuric acid and. In stabilized annealed material, the sensitization.
Figure 34 shows an isocorrosion chart for carpenter alloy 20cb3. You can obtain quite a bit of information, including corrosion resistance, from their website. Carpenter 20cb 3 strip in the stabilized, tig welded and solution annealed conditions has been sensitized in the range 1050 to 1625 f 566 to 885 c prior to intergranular corrosion testing in the huey, ferric sulfatesulfuric acid, nitrichydrofluoric acid and strauss tests. Hastelloy c22 alloy hastelloy c276 alloy haynes 625 alloy hastelloy c22 alloy 2. Carpenter 20 cb 3 stainless, uns n08020 shaped, flat, square, round, fine wire, plated and bare wire speci. Contents principal features laboratory corrosion tests field evaluation typical applications aqueous corrosion data resistance to localized attack thermal stability isocorrosion curves physical properties hardness and impact strength tensile data fabrication welding machining availability sales office addresses h2019f. Alloy 20, also known as carpenter 20, is a nickelironchromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulfuric acid. Stainless steels and specialty alloys for modern pulp and. Refer to these general guidelines about alloy selection and manufacturing from carpenter technical staff. Below you can find our current stock of carpenter 20cb3 alloy 20.
With the addition of copper, molybdenum and niobium, alloy 20 is the alloy of choice for sulphuric acid applications. Hastelloy c 22 alloy excels in pitting resistance hastelloy c4 alloy samples were subjected to a solution of 11. Corrosion resistance of nici ultimet alloy a cobaltbase alloy with exceptional resistance to galling, cavitation erosion, slurry erosion, liquid droplet impact, and various forms of corrosive attack. Using carpenter 20 in h2so4 corrosion engineering engtips. We specialise in round bars, hex bars, hex bolts, nuts, washers, wire rods and flanges. Readbag users suggest that h2019f is worth reading. Ultimet alloy electrogalvanizing rolls have been used successfully in the production of galvanized steel for automobiles in the far east and europe. The corrosion resistance of nickelcontaining alloys in. Soonv c22 alloy 2 soonv c22 alloy excels in pitting resistance soonv c4 alloy samples were subjected to a solution of 11.
Astm a265, b366, b462, b463, b464, b468, b471, b472, b473, b474, b475, b729 and their corresponding. Iso corrosion chart for carpenter 20cb3 stainless in sulfuric acid. Nickel, cobalt, and their alloys asm specialty handbook. Corrosion rate in nonaerated h 2 so 4 at 80c 176f corrosion rate versus concentration in boiling h 2 so 4, 050% h 2 so 4 isocorrosion curves 0100% h 2 so 4 corrosion of annealed 20cb 3 to boiling h 2 so 4 at various concentrations 5%, 10% and 25% h 2 so 4 20cb 3 stainless steel, carpenter. Page 3 preface corrosion engineering bulletins are published by inco so that industry may have uptodate corrosion data upon which a more knowledgeable selection of nickelcontaining alloys. Isocorrosion curves 0100% h 2 so 4 corrosion of annealed 20cb 3 to boiling sulphuric acid at various concentrations 5%, 10% and 25% h 2 so 4. The corrosionwear rate of ultimet alloy in this application is about half that of the previously used nicrmo alloy. Carpenter has been manufacturing, developing and improving stainless steels and specialty alloys since the 1920s. This superalloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. High performance stainless steels stainless steel world. The file contains 23 pages and is free to view, download or print. Corrosion rate versus concentration of boiling sulphuric acid, 050% h 2 so 4.
An isocorrosion curve for type 316 stainless steel in sulfuric. Carpenter 20 cb3 stainless steel uns n08020 ulbrich. Carpenter 20cb 3 alloy 227 partially dissolved avesta 254 smo alloy 83 pitting, crevice attack allegheny al6xn alloy 60 pitting, crevice attack haynes 625 alloy 29 pitting, crevice attack hastelloy c22 alloy 3. Alloy 20, uns n08020, carpenter 20, 20cb3, incoloy alloy. These graphs show a comparison of a superduplex stainless steel with a low 0. Alloy 825, 20cb 3 alloys, 800, 800h, 803 mo cu fe cr brightray alloys c, s nimonic alloy 75 cr nickel 200, 201 alloy 80a co alloy 90 mo mo alloy 864 physical metallurgy of nickel and nickel alloys because nickel is a versatile element and has solubility for a number of other metals, many different commercial alloys are available. Microstructure and corrosion resistance of ten experimental. The corrosion resistance of nickelcontaining alloys. Incoloy alloy 20 chemical composition, carpenter 20. The beneficial influence of copper on the pitting resistance of superduplex stainless steels in chloride environments is shown in the accompanying polarisation curves. Hastelloy c276 alloy is a nickelmolybdenumchromium wrought alloy that is generally considered a versatile corrosion resistant alloy. The latest alloy in this series, alloy 20 cb3, was introduced in 1963. Stainless steels and specialty alloys for modern pulp and paper mills reference book series no 11 025 the material presented in this publication has been prepared for the general information of the reader and should not be used or relied on for specific applications without first securing competent advice. Carpenter 20cb 3 alloy 57 sample dissolved alloy 825 58 sample dissolved hastelloy b2 alloy 58 sample dissolved haynes 625 alloy 29 severe corrosion attack hastelloy c276 alloy 28 severe corrosion attack hastelloy c22 alloy 4.
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