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duplex stainless steel
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in Metallography and Microstructures of Stainless Steels and Maraging Steels[1]
> Metallography and Microstructures
Published: 01 December 2004
Fig. 3 Example of flashing when a stainless steel (duplex stainless steel in this case), polished with colloidal silica, is etched with a reagent containing chlorine ions. Glyceregia etch
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Published: 01 January 1993
Fig. 2 Microstructure of cast Fe-22Cr-5.5Ni-3Mo-0.15N duplex stainless steel etched electrolytically in 40% NaOH. 25×. Courtesy of The Welding Institute
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in Metallography and Microstructures of Stainless Steels and Maraging Steels[1]
> Metallography and Microstructures
Published: 01 December 2004
Fig. 67 Ferrite-austenite grain structure of 2205 duplex stainless steel etched with aqueous 20% NaOH at 3 V dc for 15 s to color ferrite. (a) Solution annealed at 1200 °C (2190 °F). (b) After high-temperature exposure at 800 °C (1470 °F) for 2 h, producing σ phase (dark spots). (c) After 8 h
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Published: 01 December 1998
Fig. 44 Microstructure of a typical mill-annealed duplex stainless steel plate showing elongated austenite islands in the ferrite matrix. Etched in 15 mL HCl in 100 mL ethyl alcohol. 200×
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Published: 01 December 2004
Fig. 18 Microstructure of wrought 7-Mo duplex stainless steel (Fe-<0.1%C-27.5%Cr-4.5%Ni-1.5%Mo) solution annealed and then aged 48 h at 816 °C (1500 °F) to form sigma. Electrolytic etching with aqueous 20% NaOH (3 V direct current, 10 s) revealed the ferrite as tan and the sigma as orange
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Published: 01 December 2004
Fig. 30 Microstructure of 7-Mo PLUS duplex stainless steel (Fe-<0.03%C-<2%Mn-27.5%Cr-4.85%Ni-1.75%Mo-0.25%N) welded with Nitronic 50, etched with Beraha's BI reagent, and viewed with bright-field illumination. Ferrite is colored, and austenite is unaffected. The magnification bar is 200
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Published: 01 December 2004
Fig. 51 Microstructure of as-cast ASTM A 890-5A duplex stainless steel (Fe-<0.03%C-<1.5%Mn-<1%Si-25%Cr-7%Ni-4.5%Mo-0.2%N) in the solution-annealed condition. Etched with LB1 (100 mL water, 20 g NH4FHF, and 0.5 g K 2 S 2 O 5 ). Austenite is colored, and ferrite is unaffected. Because
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Published: 01 January 1989
Fig. 25 Comparison of tool life for a duplex stainless steel (S32950), a high-nitrogen austenitic stainless steel (S20910), and a lower-nitrogen austenitic stainless steel (S31600). Tool life is measured as the distance traveled along a 25 mm (1.0 in.) diam bar until tool failure. Shaded areas
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Published: 01 January 2006
Fig. 5 Isocorrosion diagram for a duplex stainless steel, Ferralium alloy 255, in H 2 SO 4 +HCl mixtures at 52 °C (125 °F). Data point values and contour lines are corrosion rate in mils/yr.
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Published: 01 January 2005
Fig. 4 Toughness of solution-annealed duplex stainless steel castings (closed symbols) and companion wrought alloys (open symbols) as a function of test temperature. Source: Ref 4
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Published: 01 January 1990
Fig. 63 Effect of ferrite content on the time to failure for duplex stainless steels in boiling 42% MgCl 2 under an applied stress of 240 MPa (34.8 ksi). Source: Ref 368
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Published: 01 January 1990
Fig. 39 Comparison of tool life for a duplex stainless steel (S32950), a high-nitrogen austenitic stainless steel (S20910), and a lower-nitrogen austenitic stainless steel (S31600). Tool life is measured as the distance traveled along a 25 mm (1.0 in.) diam bar until tool failure. Shaded areas
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Published: 01 January 1990
Fig. 43 Photomicrograph of a duplex stainless steel showing elongated austenite islands in the ferrite matrix. The mill-annealed 19.1 mm (0.752 in.) thick plate sample is a longitudinal section etched using 15 ml HCl in 100 ml ethyl alcohol. 200×
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Published: 01 January 1996
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Published: 01 January 1996
Fig. 12 Air and corrosion fatigue behavior of duplex stainless steel 22Cr-5Ni-3Mo. 250 MPa mean stress at 50 Hz. Source: Ref 43
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Published: 15 January 2021
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Published: 15 December 2019
Fig. 9 Microstructure of 7-Mo PLUS duplex stainless steel (Fe-<0.03C-<2%Mn-27.5%Cr-4.85%Ni-1.75%Mo-0.25%N) etched using Beraha’s reagent (15 mL HCl, 85 mL water, 1 g K 2 S 2 O 5 ) and viewed using bright-field illumination. Ferrite is colored and austenite is unaffected
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Published: 30 August 2021
Fig. 49 Duplex stainless steel 2205 weld showing stress-corrosion crack on the inside diameter of the vessel
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Published: 30 August 2021
Fig. 50 Duplex stainless steel 2205 stress-corrosion cracks in the heat-affected zone of the vessel
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Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001411
EISBN: 978-1-62708-173-3
... Abstract This article provides information on the base material properties of wrought duplex stainless steels (DSS). These properties include microstructure, alloy grades, mechanical and physical properties, and corrosion resistance. The article reviews the applications and microstructural...
Abstract
This article provides information on the base material properties of wrought duplex stainless steels (DSS). These properties include microstructure, alloy grades, mechanical and physical properties, and corrosion resistance. The article reviews the applications and microstructural development of DSS. It describes the factors influencing welding and weldability of the DSS. These factors include preheating, postweld heat treatment, interpass temperature control, welding practices, welding procedure qualification, filler metal requirements, cracking behavior, and loss of properties. The article examines the applicable welding processes such as fusion welding and solid-state welding processes.
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