Influence of Cooling Rates on Nitrogen Precipitation Behaviors and the Ferrite Fraction in Cast 2507 Super Duplex Stainless Steel

2012 ◽  
pp. 25-31
Author(s):  
Dong Liang ◽  
Honggang Zhong ◽  
Zhenxing Yin ◽  
Qijie Zhai
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Super Duplex Stainless Steel ◽  
Cooling Rates ◽  
Ferrite Fraction

scholarly journals Bead by bead study of a multipass shielded metal arc-welded super-duplex stainless steel

2019 ◽  
Vol 64 (2) ◽  
pp. 283-299 ◽  
Author(s):  
Vahid A Hosseini ◽  
Kjell Hurtig ◽  
Leif Karlsson
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Weld Zone ◽  
Grain Morphology ◽  
Bead Geometry ◽  
Super Duplex Stainless Steel ◽  
Thermal Cycles ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Ferrite Fraction

AbstractThe present study aims at investigating bead geometry and the evolution of microstructure with thermal cycles in multipass shielded metal arc welding of a V-groove 13-mm type-2507 super-duplex stainless steel (SDSS) plate. The weld consisted of 4 beads produced with arc energies of 0.81–1.06 kJ/mm. The upper beads showed lower base metal (BM) dilution than the first bead. Thermal cycles were recorded with thermocouples, indicating that the cooling rate decreased in the as-deposited weld zone when adding a new bead. Ferrite fraction in the as-welded condition was lower for the upper beads. The austenite grain morphology in reheated passes varied depending on the local peak temperatures and the number of reheating passes. Sigma phase precipitated in a location reheated by the third and fourth passes that was subjected to a critical peak temperature for sigma precipitation. Ferrite content, measured using image analysis and Fisher FERITSCOPE technique, showed that the ferrite fraction moved toward 50/50% in the weld metal with an increasing number of reheating cycles. Finally, a schematic map showing an overview of the microstructure in the multipass SDSS weld was introduced.

ZERON 100

Alloy Digest ◽  
1993 ◽  
Vol 42 (11) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Duplex Stainless Steel ◽  
Heat Treating ◽  
Super Duplex Stainless Steel ◽  
Corrosion Performance ◽  
Temperature Performance ◽  
Offshore Oil

Abstract ZERON 100 is a super duplex stainless steel which is manufactured to give a guaranteed corrosion performance by using an equation to control the chemistry in those elements which will determine the corrosion resistance of the material. Major usages in seawater applications, particularly offshore oil gathering systems. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance as well as heat treating, machining, and joining. Filing Code: SS-555. Producer or source: Weir Material Services Ltd.

Experimental investigation on dissimilar weld between super duplex stainless steel 2507 and API X70 pipeline steel

2021 ◽  
pp. 146442072110130
Author(s):  
Waris N Khan ◽  
Rahul Chhibber
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Pipeline Steel ◽  
High Strength ◽  
Super Duplex Stainless Steel ◽  
Shielded Metal Arc Welding ◽  
Electrode Coating ◽  
Dissimilar Weld ◽  
Metal Arc Welding ◽  
Welding Electrode

This work investigates the microstructure and mechanical properties of 2507 super duplex stainless steel and API X70 high strength low alloy steel weld joint. This joint finds application in offshore hydrocarbon drilling riser and oil–gas pipelines. Coated shielded metal arc welding electrodes have been designed and extruded on 309L filler and their performance compared with a commercial austenitic electrode E309L. Filler 309L solidifies in ferrite-austenite (F-A) mode with a resultant microstructure comprising skeletal ferrites with austenite distributed in the interdendritic region. Results of tensile and impact tests indicate that weld fabricated with laboratory-developed electrodes has higher ductility and impact energy than the commercial electrode. The tensile strength and weld hardness of commercial electrodes are superior. The laboratory-made electrode’s microhardness is lower than the commercial electrodes, making the former less prone to failure. An alternative welding electrode coating composition has been suggested through this work and found to be performing satisfactorily and comparable to the commercially available electrodes.

On the Precipitation of Sigma and Chi Phases in a Cast Super Duplex Stainless Steel

2019 ◽  
Vol 50 (10) ◽  
pp. 4758-4778 ◽  
Author(s):  
R. O. Sousa ◽  
P. Lacerda ◽  
P. J. Ferreira ◽  
L. M. M. Ribeiro
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Super Duplex Stainless Steel

Effect of aging of 2507 super duplex stainless steel on sliding tribocorrosion in chloride solution

Wear ◽  
2017 ◽  
Vol 380-381 ◽  
pp. 251-259 ◽  
Author(s):  
J. Michael Shockley ◽  
Derek J. Horton ◽  
Kathryn J. Wahl
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Chloride Solution ◽  
Super Duplex Stainless Steel
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