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WELDING PRODUCT PROGRAMMEDuplex and Super Duplex stainless steel Customised formulations Consistent quality Single point source for complete range Technical expertise Experience in worldwide major projects Selectarc range covers a wide range of specifications
WELDING PRODUCT PROGRAMMEDUPLEX STAINLESS STEELFSHWelding Group works to ensure its customers toget the full benefit of its very extensive expertise.Founded in 1952, Selectarc Industries’ arc welding electrodesmanufacturing plant has built up a reputation for leading expertisein the field, ranking it alongside the industry’s key players both inFrance and on the export market.Micro structureThe impeccable qualityand extensive range of itsstandard and customisedproducts, along with itsquality control processes,guarantee compliance withits clients’ exacting specifications. Our aim is simpleyet ambitious: to constantlyimprove to ensure the satisfaction of every single customer.Details MicrographsBase metalPure weld metalHAZ233-246230-290261-277Hardness (Hv)Applications :Duplex stainless steel Duplex means « two ». Duplex stainless steels consist of thetwo phases, Ferrite and Austenite and are often termed Ferritic-Austenitic stainless steels. Typically, duplex stainless steelshave a microstructure consisting of approximately 50% ferriteand 50% austenite. De-salination equipments Pumps, Pressure vessels, Tanks, Piping, and Heatexchangers in the Chemical processing industry Piping, Tubing, and Heat Exchangers for thehandling of Gas and Oil Effluent scrubbing systems Ferrite gives high strength and some resistance to stresscorrosion cracking, the austenite provides good toughness,and the two phases in combination give the duplex steels theirattractive corrosion resistance.Pulp and Paper industry digesters, Bleachingequipment, stock-handling systems Rotors, Fans, Shafts, and Press rolls requiringcombined strength and corrosion resistanceThe most important alloying elements of duplex stainless steelsare Cr, Ni, Mo and N. Cargo Tanks for Ships and Trucks Food processing equipment
Duplex stainless steelProperties / AdvantagesWelding procedure High general corrosion resistance1. Pre-heating treatment Pitting and Crevice corrosion resistance superiorto SS316L, 317L austenitic stainless steel High resistance to chloride stress corrosioncracking High resistance to corrosion fatigue and erosion Good sulfide stress corrosion resistance2. Welding High strength Excellent toughness2.1. Choose the right filler metal and welding process to getthe right weld metal toughness: Lower thermal expansion and higher thermal conductivity than austenitic stainless steels TIG consumables give higher impact values than any otherconsumable; Good workability and weldability Basic coated/type consumables give better impact valuesthan rutile/ acidic coating;To respect certain parameters as heat input and interpasstemperature: Preheating of Duplex Stainless Steels is not necessary andnot recommendedThe temperature of the plates or pipes to be welded shouldbe about 20 C Weldability of duplex stainless steelFabricating duplex stainless steels, special attention should bepaid to heat treatment and welding. Unsuitable heat treatmentcan result in precipitation of inter-metallic phases and deterioration of toughness and corrosion resistance. Although most welding methods can be used to weld duplex steels, they requirespecial procedures for the retention of properties after welding.To avoid problems such as corrosion resistance, toughness,or post weld cracking, the welding procedure should focuson minimizing total time at temperature in the ‘Red Hot’ 500- 790ºC range for the whole procedure rather than managingthe heat input for any one pass.Influence of coating on Impact properties.These are technically and economically optimal procedures !2.2. To guarantee a balanced Austenite-Ferrite ratio in welddeposit.Phase balanceToo much ferrite ( 70 %) Ductility and toughness Corrosion resistance (Nitrides) Too much austenite ( 80%) SCC resistance Mechanical strength Typical requirements according to engineering specificationsFerrite content: 30-55% (30-60%)
2.5. Welding ParametersGrade of Duplex2304 / 1.4362Heat input 0.5 - 2.5 kJ/mm2205 / 1.4462Interpass temperature 170 CGrade of Super DuplexAdvice1.4507Influence of Elements and Cooling rate on % Ferrite.Fast Cooling — High FerriteSlow Cooling — Low FerriteInfluence of elementsAdvice2507 / 1.44101.4501Heat input 0.4 - 1.5 kJ/mmInterpass temperature 150 CThe linear heat input "Es" is calculated based on weldingparameters :Es ( V x A ) / S x 60/1000V Arc voltage ( V ) ;A Welding current ( A ) ;S Welding speed ( mm / min )2.3. To get required Austenite – Ferrite ratio in the heataffected zone (HAZ)2.4. To prevent phase precipitations which will reducecorrosion as well as mechanical properties (ASTM A923)3. Post Weld heat treatmentA post weld heat treatment (PWHT) is not recommended. Fortemperatures above 290 C it is dangerous as phase precipitations will occur.4. Cleaning, Pickling and PassivationTo obtain the best corrosion resistance, it is essential to removeoxide, tarnish, heat tint, and other surface contamination by mechanical or chemical methods, ideally both. Thorough washingmust be done after pickling.
Product rangeProduct name AWS/ENInox 2209AWS A5.4: E2209-17EN 1600 / ISO 3581-A:E 22 9 3 N L R 3 2Main featuresFor Duplex steels / rutileRutile-basic electrode with a duplex structure. Easy to weld in all positions,except vertical down. Stable arc, regular drop transfer, easy slag removal,finely rippled weld beads. The weld metal can be applied for operation temperatures up to 250 C.For Duplex steels / basicBasic coated electrode with a Duplex microstructure (duplex). The welddeposit is characterized by a high resistance against Pitting, Crevice andstress corrosion in chloride containing media, like sea water, combined with avery high tensile strength. Easy to weld with, stable arc, easy to remove slag,regular weld beads.For Super Duplex steelsBasic coated Super Duplex electrode( 40% ferrite). Weld metal is resistantin chloride containing medias against pitting as well as crevice and stresscorrosion. Used for impellers and other components which require highstrength combined with corrosion attack. Pitting index: 40.Basic coated / for SuperDuplex stainless steelsBasic coated electrode with an austenitic - ferritic microstructure (duplex 40% ferrite). Good resistant in chloride containing medias against pitting aswell as crevice and stress corrosion. Electrodes are used for pumps, vessels,piping systems etc. attacked by chloride containing solutions. Pitting index: 40.For Duplex steelsVery low carbon content solid rod for GTAW / GMAW welding Duplex steels(austenitic-ferritic microstructure), such as Uranus 45N, 2205, 2304. Resistant in chloride containing media against pitting corrosion as well as creviceand stress corrosion.For Super Duplex steelsVery low carbon content solid rod for GTAW / GMAW Duplex and SuperDuplex Stainless Steels (austenitic-ferritic microstructure). Resistant in chloride containing media against pitting corrosion as well as crevice and stresscorrosion. Pitting index (PREN): 40.For Super Duplex steelsVery low carbon content solid GTAW rod for joining Duplex and Super DuplexStainless Steels (austenitic-ferritic microstructure). Resistant in chloridecontaining media against pitting corrosion as well as crevice and stresscorrosion. Pitting index (PREN): 40.For Super Duplex steels inflat positionsFlux cored wire to weld in flat positions with shielding gas protection with anaustenitic-ferritic microstructure (Duplex). Stable arc, Less spatter and easyslag removal.Exist also with a basic slag : FCW D22/09-B.For Duplex steels in allpositionsFlux cored wire to weld in all positions with shielding gas protection with anaustenitic-ferritic microstructure (Duplex). Stable arc, Less spatter and easyslag removal.For Super Duplex steels inflat positionsFlux cored wire to weld in flat positions with shielding gas protection with anaustenitic-ferritic microstructure (Duplex). Stable arc, Less spatter and easyslag removal. Pitting index (PREN): 40.Exist also in All Positions: FCW D25/09-AP.Inox 2209BAWS A5.4: E2209-15EN 1600 / ISO 3581-A:E 22 9 3 N L B 4 2Inox 2509MoBAWS A5.4: E2594-15EN 1600 / ISO 3581-A:E 25 9 4 N L B 4 2Inox 2509MoWBAWS A5.9: E2595-15EN 1600 / ISO 3581-A:E 25 9 4 N L B 42TIG/MIG D22/09AWS A5.9: ER2209EN ISO 14343-A:W 22 9 3 N LG 22 9 3 N LTIG/MIG D25/09AWS A5.9: ER2594EN ISO 14343-A:W 25 9 4 N LG 25 9 4 N LTIG/MIG D25/09WAWS A5.9: ER2594EN ISO 14343-A:G 25 9 4 N LW 25 9 4 N LFCW D22/09-FAWS A5.22 E2209T0-1/-4EN ISO 17633-A:T 22 9 3 N L R M 3FCW D22/09-APAWS A5.22 E2209T1-1/-4EN ISO 17633-A:T 22 9 3 N L P M 1FCW D25/09-FAWS A5.22 E2594T0/-4EN ISO 17633-A:T 25 9 4 N L R M 3DescriptionTechnical datasheets available on: www.fsh-welding.com/en/datasheets.htm
Welding of Dissimilar MetalWelding Consumables used for Dissimilar Metal WeldingBase Material230422052507 Super duplexCarbon Steel /Low Alloy SteelInox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/09304L / 347Inox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/09316L / 318Inox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/09309L / 309LMoInox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/09410Inox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/092304Inox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/092205Inox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/092507Inox 2209D22/09Inox 2209D22/09Inox 2509MoBD25/09Legend : In black MMAIn blue TIG/MIG WiresServices Advice and assistanceA team of engineers and experienced welders help customers with selecting the materials and consumables that are best suited foreach application. Research and Development (R & D)The R&D department carries out product tests (mechanical and non-destructive tests) in accordance with customer requests. Customer ServiceThe sales department is available to respond quickly to any request.QualitySELWFDUPL201308ENISO 9001 certificationSELECTARC INDUSTRIESPlace des Forges90600 Grandvillars – FranceTel : 33 3 84 57 37 77Email : sales@fsh-welding.comwww.fsh-welding.com
Product name AWS/EN Main features Description Inox 2209 AWS A5.4: E2209-17 EN 1600 / ISO 3581-A: E 22 9 3 N L R 3 2 For Duplex steels / rutile Rutile-basic electrode with a duplex structure. Easy to weld in all positions, except vertical down. Stable arc, regular drop transfer, easy slag removal, finely rippled weld beads. The weld metal can be applied for operation tem-File Size: 2MBPage Count: 6
