Dissimilar Welding between 2205 Duplex Stainless Steel and API X52 High Strength Low Alloy Steel

2018 ◽  
Vol 18 ◽  
pp. 7-13
Author(s):  
Brahim Belkessa ◽  
Djamel Miroud ◽  
Billel Cheniti ◽  
Naima Ouali ◽  
Maamar Hakem ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Alloy Steel ◽  
Welding Process ◽  
High Strength ◽  
Dissimilar Welding ◽  
Low Alloy Steel ◽  
Shielded Metal Arc Welding ◽  
2205 Duplex Stainless Steel ◽  
Metal Arc Welding

This work purposes to investigate the microstructure and the mechanical behavior of dissimilar metals weld between 2205 duplex stainless steel (UNS 31803) and high strength low alloy steel API X52. The joining was produced by shielded metal arc welding process using two different filler metals, the duplex E2209 and austenitic E309 grade.The microstructures of the dissimilar welded joints have been investigated by optical microscopy, scanning electron microscopy and energy-dispersive spectroscopy (EDS). The EDS analysis performed at the API X52/weld metal interface showed an evident gradient of Cr and Ni between fusion and type II boundaries, where the highest hardness value was recorded.

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.

Evaluation of microstructure and texture across the welded interface of super duplex stainless steel and high strength low alloy steel

2015 ◽  
Vol 264 ◽  
pp. 150-162 ◽  
Author(s):  
Abbas Eghlimi ◽  
Morteza Shamanian ◽  
Masoomeh Eskandarian ◽  
Azam Zabolian ◽  
Majid Nezakat ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Alloy Steel ◽  
High Strength ◽  
Low Alloy Steel ◽  
Super Duplex Stainless Steel

Characterization of Clad Joints of High Strength Low Alloy Steel with Stainless Steel and Titanium

2018 ◽  
Vol 51 (4) ◽  
pp. 46
Author(s):  
N. Venkateswara Rao ◽  
G. Madhusudhan Reddy ◽  
S. Nagarjuna
Keyword(s):  
Stainless Steel ◽  
Alloy Steel ◽  
High Strength ◽  
Low Alloy Steel

Corrosion Risk and Repassivation of Duplex Stainless Steel UNS S82551 in Treated Seawater Injection Service

CORROSION ◽  
10.5006/3697 ◽  
2021 ◽  
Author(s):  
Nicolas Larche ◽  
Perry Nice ◽  
Hisashi Amaya ◽  
Lucrezia Scoppio ◽  
Charles Leballeur ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Dissolved Oxygen ◽  
Duplex Stainless Steel ◽  
Oxygen Content ◽  
Alloy Steel ◽  
Stainless Steels ◽  
Crevice Corrosion ◽  
Low Alloy Steel ◽  
Corrosion Risk ◽  
Service Conditions

In seawater injection wells, the available well tubing materials are generally Low alloy steel, Glass Reinforced Epoxy lined low alloy steel or Corrosion Resistant Alloy’s (CRA) such as super duplex stainless steel. However, in treated seawater the corrosion risk can be controlled and lower grade alloys (low alloy steel) can be considered. But for long well lifetime designs (20 years plus), then low alloy steel tubing can be challenged. In this respect recent efforts have focused attention on better dissolved oxygen control which permits the investigation and on the possible use of more cost-effective materials such as the duplex stainless steels UNS S82551, and UNS S82541 (the latter is a higher strength version, but same PRENw). Full scale testing of tubes joined together with a proprietary premium threaded connection (PCPC couplings) was performed in controlled seawater loops simulating service conditions at 30°C. The flow rate and dissolved oxygen were controlled at 5 m/s and <20ppb, respectively. Weekly dissolved oxygen excursions corresponding to 24h at 100ppb followed by 1 hour at 300ppb were performed during the 5 months exposure. Corrosion results of UNS S82551/S82541 tubing were compared to UNS S31803 and UNS S39274. In parallel, laboratory exposures of creviced coupons for parametric study were performed in dissolved oxygen-controlled cells, allowing the measurement of electrochemical potentials as function of dissolved oxygen content and the related corrosion resistance. The results showed that dissolved oxygen content should be properly controlled below critical values to avoid crevice corrosion of the lesser alloyed duplex stainless steels. The ability of UNS S82541 to recover or re-passivate after prolonged exposures to high dissolved oxygen concentrations (DOC) was also determined with both the use of full sized pipe-coupling premium connection (PCPC) test cells, and electrochemical testing involving a Remote Crevice Assembly (RCA). The re-passivation potential was investigated after different active crevice corrosion durations. The results of the study allowed to precisely define the limits of use of UNS S82541 in treated seawater, i. e. the critical DOC conditions for corrosion initiation and for re-passivation of UNS S82541. For all tested conditions, the UNS S82551/S82541 showed a rather good ability to re-passivation when normal service conditions (i. e. low dissolved oxygen) are recovered.

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