Revised ANSI/AWS A 5.5-1996 Specification For Low-alloy Steel Electrodes for Shielded Metal Arc Welding - A Review

2018 ◽  
Vol 31 (1) ◽  
pp. 23
Author(s):  
M. P. Dhanuka
Keyword(s):  
Alloy Steel ◽  
Arc Welding ◽  
Low Alloy Steel ◽  
Shielded Metal Arc Welding ◽  
Metal Arc Welding ◽  
Steel Electrodes

Experimental investigations on P22/P91 dissimilar shielded metal arc welds for power plant applications

2020 ◽  
Vol 234 (10) ◽  
pp. 1313-1324
Author(s):  
Sumit Mahajan ◽  
Rahul Chhibber
Keyword(s):  
Arc Welding ◽  
Structural Integrity ◽  
Operating Conditions ◽  
Experimental Investigations ◽  
Low Alloy Steel ◽  
Shielded Metal Arc Welding ◽  
Dissimilar Weld ◽  
Metal Arc Welding ◽  
Temperature Operating ◽  
The Impact

This article deals with the development of shielded metal arc welding electrodes for P22/P91 welds. A comparison has also been drawn with commercially available electrodes. P22 low alloy steel matching electrodes developed in the laboratory using a mixture design approach was employed to fabricate the dissimilar weld. Experimentations were performed to evaluate the microstructure and mechanical properties of microhardness, tensile strength, and impact energy of the welds. The impact strength was found to improve by 19% for a laboratory developed electrode made welds as compared to the commercial electrodes. The weld chemistry investigations indicate that the weld fabricated with laboratory-developed electrodes have a higher amount of chromium and molybdenum. These elements are known to enhance the corrosion resistance of joint, thereby imparting enhanced structural integrity in high temperature operating conditions. The electrodes designed and developed in this work are found to enhance the properties of P22/P91 joint much better as compared to that with the commercial electrodes.

Ni-ROD WE

Alloy Digest ◽  
1995 ◽  
Vol 44 (11) ◽  
Keyword(s):  
Power Supply ◽  
Arc Welding ◽  
Low Alloy Steel ◽  
Shielded Metal Arc Welding ◽  
Cast Irons ◽  
Current Electrode ◽  
Thin Sections ◽  
Metal Arc Welding ◽  
Welding Electrode ◽  
Malleable Cast

Abstract NI-ROD Welding Electrode is used for shielded-metal-arc welding of gray, ductile, and malleable cast irons. It is also used for joints between cast irons and carbon steel or low-alloy steel. The electrode is particularly useful for thin sections and for joints to be machined. NI-ROD welding electrode can be operated in all welding positions. Power supply: direct current, electrode positive is preferred although alternating current can be used. This datasheet provides information on composition and tensile properties. It also includes information on joining. Filing Code: Ni-490. Producer or source: Inco Alloys International Inc.

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.

scholarly journals THE EFFECT OF VARIATION OF ELECTRIC CURRENT ON MICRO STRUCTURE AND HARDNESS IN SS400 STEEL WELDING PROCESS USING THE SMAW METHOD

2019 ◽  
Vol 1 (2) ◽  
pp. 81
Author(s):  
Irfan Adi Wibowo ◽  
Suharno Suharno ◽  
Indah Widiastuti
Keyword(s):  
Alloy Steel ◽  
Arc Welding ◽  
Comparative Research ◽  
Welding Process ◽  
Raw Material ◽  
Shielded Metal Arc Welding ◽  
Hardness Level ◽  
Hardness Tester ◽  
Metal Arc Welding ◽  
Ferrite Structure

<p>The objective of research was to find out the effect of current on microstructure and hardness value in Alloy Steel SS400 before (raw material) and after welding using Shielded Metal Arc Welding (SMAW).</p><p>This research uses experiment methods. Technique of analyzing data used was a descriptive comparative research. The instruments used for testing microstructure and hardness were Olympus Metallurgical Microscope and Vickers Hardness Tester.</p><p>Base on the result of research, it could be concluded that the result of microstructure testing showed the improved  ferrite structure after welding. In raw material, ferrite structure seemed to looks evenly, but the result of welding using SMAW welding method with current of I20 A, 130 A, and 140A showed that ferrite structure reduced in each specimen, so that  perlite structure was very dominant. The hardness value of hardness result showed the different hardness level. The specimen with current of 140 A had higher hardness level of 231,055 VHN than the specimen with current of 120 A (219.222 VHN) and 130 A (223,333 VHN). The result of hardness testing on raw material was 182,333 VHN. This research showed that the welding using varying current changed microstructure and affected the hardness value of Alloy Steel SS400.</p>

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