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96420 WELDING TECHNIQUES FOR HIGH ALLOY AUSTENITIC STAINLESS STEEL

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Product Number: 51300-96420-SG
ISBN: 96420 1996 CP
Author: T G Gooch, P Woollin
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Factors controlling corrosion resistance of weldments in high alloy austenitic stainless steel are described, with emphasis on microsegregation, intermetallic phase precipitation and nitrogen loss from the molten pool. The application is considered of a range of welding, processes, both fusion and solid state. Autogcnous fusion weldments have co-rosion resistance below that of the parent, but low arc energy, high travel speed and use of N2-bearing shielding gas are recommended for best properties. Conventional fusion welding practice is to use an overalloycd nickel-base filler rnetal to avoid preferential weld metal corrosion, and attention is given to the effects of consumable composition and level of wcldpool dilution by base steel. With non-matching consumables, overall joint corrosion resistance may bc limited by the presence of a fusion boundary unmixed zone: better performance may bc obtained using solid state friction welding, given appropriate component geometry. Overall, the effects of welding on supcraustcnitic steels are understood, and the materials have given cxccllent service in welded fabrications. The paper summarises recommendations on preferred welding procedure.
Factors controlling corrosion resistance of weldments in high alloy austenitic stainless steel are described, with emphasis on microsegregation, intermetallic phase precipitation and nitrogen loss from the molten pool. The application is considered of a range of welding, processes, both fusion and solid state. Autogcnous fusion weldments have co-rosion resistance below that of the parent, but low arc energy, high travel speed and use of N2-bearing shielding gas are recommended for best properties. Conventional fusion welding practice is to use an overalloycd nickel-base filler rnetal to avoid preferential weld metal corrosion, and attention is given to the effects of consumable composition and level of wcldpool dilution by base steel. With non-matching consumables, overall joint corrosion resistance may bc limited by the presence of a fusion boundary unmixed zone: better performance may bc obtained using solid state friction welding, given appropriate component geometry. Overall, the effects of welding on supcraustcnitic steels are understood, and the materials have given cxccllent service in welded fabrications. The paper summarises recommendations on preferred welding procedure.
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Picture for 96601 FABRICATION, WELDING AND HEAT TREATMENT
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96601 FABRICATION, WELDING AND HEAT TREATMENT OF NICKEL ALLOYS

Product Number: 51300-96601-SG
ISBN: 96601 1996 CP
Author: C.S. Tassen, G.D. Smith, S.K. Mannan, E.B. Hinshaw
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Picture for 06208 THE FABRICATION PRACTICES & IMPACT
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06208 THE FABRICATION PRACTICES & IMPACT OF WELDING ON CORROSION RESISTANCE OF HIGH NI-CR-MO ALLOYS

Product Number: 51300-06208-SG
ISBN: 06208 2006 CP
Author: D. C. Agarwal, Bernd Hoberg
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Picture for 06497 EFFECT OF WELDING RELATED MICROSTRUCTURE
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06497 EFFECT OF WELDING RELATED MICROSTRUCTURE ON STRESS CORROSION CRACKING SUSCEPTIBILITY IN CAUSTIC SOLUTIONS

Product Number: 51300-06497-SG
ISBN: 06497 2006 CP
Author: Ananya Bhattacharya, Preet M Singh, Heikki Leinonen, Jamshad Mahmood
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Stress Corrosion Cracking in the weld and heat affected zones of Duplex Stainless Steels has been experienced in different industries.  In this paper, an attempt has been made to study the various aspects of this type of corrosion, brought about by welding.  Results show duplex stainless steel base metal is also susceptible.
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