The influence of solution annealing temperature on the properties of Lean Duplex 2101 welded joints in tubes

Rogalski, Grzegorz; Świerczyńska, Aleksandra; Landowski, Marcel

doi:10.26628/wtr.v91i4.1017

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Thus, the application of duplex stainless steels (DSSs) in civil engineering, chemical, oil and gas industries are constantly growing [6][7][8][9]. Among duplex stainless steels the low nickel and molybdenum bearing lean duplex grades show the similar corrosion resistance as the conventional austenitic grades, however providing a much a higher strength and a lower price [10]. In several applications duplex and lean duplex stainless steels should be joint welded to conventional austenitic stainless steels with higher nickel and lower chromium contents [11,12].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Corrosion Properties of Austenitic and Duplex Stainless Steel Dissimilar Joints

Varbai

Bolyhos

Kemény

et al. 2022

Period. Polytech. Mech. Eng.

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In several applications duplex stainless steels should be joint welded to conventional austenitic stainless steels. In this research LDX 2101 lean duplex stainless steel sheets were welded to conventional 304 austenitic stainless steels, using gas tungsten arc welding. For the welded joints three different welding rods were used: ER 308L, ER 309LSi, and ER 2209. For gas shielding two different shielding gases were used: argon and argon +2% nitrogen. It was found that the nitrogen addition to the shielding gas promoted austenite formation in the weld metal. It was also found Schaeffler-diagram modified by Outokumpu showed a very good estimation to the ferrite content and chemical composition of the weld metal. The ferrite content estimated by the Outokumpu-diagram, showed a close correlation to measured ferrite contents, the highest error was 30%. In case of the chemical composition of the weld metal, the Cr- and Ni-contents were estimated with a maximum of 15% error. In terms of the corrosion resistance, the best pitting corrosion resistance was achieved using the 308L welding rod with argon shielding gas, where the weight loss was 1.6% after the 24 hours immersion test.

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Section: Introductionmentioning

confidence: 99%

Microstructure and Corrosion Properties of Austenitic and Duplex Stainless Steel Dissimilar Joints

Varbai

Bolyhos

Kemény

et al. 2022

Period. Polytech. Mech. Eng.

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“…The amount of literature on welding steel from this material group is very large. Research is conducted focused on various aspects, including: the effect of supersaturation temperature on the properties of welded joints [16,17], surfacing technology [18], tests related to determining the corrosion resistance of welded joints [19] and others. In the case of vacuum brazing, reports are less numerous, which results from the high degree of complexity of this process and the know-how of the companies that use this process.…”

Section: Introductionmentioning

confidence: 99%

Qualification of brazing procedure for furnace brazing of austenitic steel according to requirements of the ASME BPVC section IX

et al. 2019

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The article presents the procedure for qualifying brazing technology in a vacuum furnace on the example of stainless steel elements joined with copper filler material from the F-No group. 105, in accordance with the ASME Sec. IX, part QB (ASME Boiler and Pressure Vessel Code. Qualification Standard for Welding, Brazing and Fusing; Procedures; Welders; Brazers; and Welding, Brazing and Fusing Operators). The essential variables of the furnace brazing process are discussed in relation to the requirements of the protocol of qualified PQR (Procedure Qualification Record) and BPS (Brazing Procedure Specification) in accordance with the ASME Sec. IX. The requirements for joints by the calculation code ASME Sec. VIII div.1 (Rules of Construction of Pressure Vessels), related to the working temperature of the designed device have also been taken into account. The paper presents examples of brazed joints made and their properties (strength, fill level of the clearance) obtained on the basis of the carried out tests. Attention was paid to the technological aspects during the performance of brazed joints using vacuum furnaces.

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Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy

Rogalski

Świerczyńska

Landowski

et al. 2020

Metals

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In this article, the mechanical properties and microstructure of 304L austenitic stainless steel/Incoloy 800HT nickel alloy dissimilar welded joints are investigated. The joints were made of 21.3 mm × 7.47 mm tubes using the TIG process with the use of S Ni 6082 nickel filler metal. No welding imperfections were found and high strength properties of joints were obtained, meeting the assumed acceptance criteria of the product’s standards. The tensile strength of the welded joints was higher than for the joined materials (Incoloy 800HT). Macro- and microscopic metallographic tests revealed the correct morphology of the joints and the appropriate structures in their critical zones. However, differences were found in the morphologies of the zones between the weld and the base materials. In fusion boundary from the side of the Incoloy 800HT alloy, no clear outline of the fusion line was observed (type A fusion boundary), while increased grain size and an epitaxial structure were observed. In turn, in the zone: weld–304L steel, a distinct fusion line was observed with areas with an increased amount of high-temperature δ ferrite (type B fusion boundary). No precipitates were found that could reduce the resistance of the joints to intergranular corrosion. A hardness decrease (approximately 30 HV0.1) in the transition zone: austenitic steel–weld and an increase of hardness (approximately 10 HV0.1) on the opposite side of the welded joint were observed.

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The influence of solution annealing temperature on the properties of Lean Duplex 2101 welded joints in tubes

Cited by 3 publications

References 17 publications

Microstructure and Corrosion Properties of Austenitic and Duplex Stainless Steel Dissimilar Joints

Microstructure and Corrosion Properties of Austenitic and Duplex Stainless Steel Dissimilar Joints

Qualification of brazing procedure for furnace brazing of austenitic steel according to requirements of the ASME BPVC section IX

Mechanical and Microstructural Characterization of TIG Welded Dissimilar Joints between 304L Austenitic Stainless Steel and Incoloy 800HT Nickel Alloy

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