scholarly journals Corrosion Resistance of TIG Welded Joints of Stainless Steels

2017 ◽  
Vol 885 ◽  
pp. 190-195 ◽  
Author(s):  
Amanda Silveira Alcantara ◽  
Enikő Réka Fábián ◽  
Monika Furkó ◽  
Éva Fazakas ◽  
János Dobránszky ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Ferric Chloride ◽  
Stainless Steels ◽  
Welded Joints ◽  
Welding Process ◽  
Inert Gas ◽  
Tungsten Inert Gas Welding ◽  
Type Stainless Steel ◽  
Different Types

The aim of this work was to analyze the performance of joints made by TIG (Tungsten Inert Gas) welding process in austenitic and duplex stainless steels with special regards to their corrosion resistance. Three different types of stainless steel were butt welded with TIG method. Ferric-chloride test and electrochemical treatments revealed how does the TIG process affects the corrosion resistance depending upon the alloy used for welding the joint. This work focuses on the weldability of the 2304, 2404 and 304 type stainless steel heterogeneous welds.

scholarly journals Modeling of Bending Properties of Stainless Steel 304 Sheets Welded by Tungsten Inert Gas Welding Process

2019 ◽  
Vol 15 (4) ◽  
pp. 10-22
Author(s):  
Ali Hussein Alwan
Keyword(s):  
Stainless Steel ◽  
Welded Joints ◽  
Gas Pressure ◽  
Inert Gas ◽  
Welding Parameters ◽  
Tungsten Inert Gas Welding ◽  
Bending Properties ◽  
Argon Gas ◽  
Bending Force ◽  
Stainless Steel 304

In this research, the effects of both current and argon gas pressure on the bending properties of welded joints were studied. Using the possible ranges of welding gas pressures and currents, Tungsten inert gas welding (TIG) of stainless steel (304) sheet was used to obtain their influence on the maximum bending force of the (TIG) welded joints. Design of experiment (DOE) ‘version 10' was used to determine the design matrix of experiments depending on the used levels of the input factors. Response surface methodology (RSM) technique was used to obtain an empirical mathematical model for the maximum bending force as a function of welding parameters (Current and Argon gas pressure). Also, the analysis of variance (ANOVA) was used to verify the adequacy of the resulted model statistically.  

FIRTH-VICKERS 448

Alloy Digest ◽  
1957 ◽  
Vol 6 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Stainless Steels ◽  
Elevated Temperatures ◽  
Heat Treating ◽  
Temperature Performance ◽  
Type Stainless Steel ◽  
High Oxidation ◽  
High Oxidation Resistance ◽  
Good Creep Resistance

Abstract FIRTH-VICKERS 448 is a ferritic type stainless steel having high oxidation resistance and strength at elevated temperatures. It has good creep resistance in the range 1020 to 1200 deg. F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep, deformation, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-51. Producer or source: Firth-Vickers Stainless Steels Ltd.

scholarly journals Effects of ATIG Welding on Weld Shape, Mechanical Properties, and Corrosion Resistance of 430 Ferritic Stainless Steel Alloy

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 404 ◽  
Author(s):  
Kamel Touileb ◽  
Abousoufiane Ouis ◽  
Rachid Djoudjou ◽  
Abdeljlil Chihaoui Hedhibi ◽  
Hussein Alrobei ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Ferritic Stainless Steel ◽  
Welding Process ◽  
Tig Welding ◽  
Inert Gas ◽  
Steel Alloy ◽  
Stainless Steel Alloy ◽  
Mechanical Properties And Corrosion

Flux activated tungsten inert gas (ATIG) welding is a variant of tungsten inert gas (TIG) welding process with high production efficiency, high quality, low energy consumption, and low cost. The study of activating flux mechanism by increasing weld penetration has direct significance in developing flux and welding process. This study has been conducted on 430 ferritic stainless steel alloy. Design of experiment is used to get the best formulation of flux. Based on Minitab17 software, nineteen compositions of flux were prepared using the mixing method. Fluxes are combinations of three oxides (MoO3-TiO2-SiO2). Using the optimizer module available in Minitab 17 software, the best formulation was obtained to achieve the best weld depth. Hence, the obtained depth is twice greater than that achieved by conventional TIG welding. Moreover, mechanical properties and corrosion resistance have been investigated for TIG and ATIG welds respectively in tensile, impact, and hardness tests, and in potentiodynamic polarization measurement test.

The Experiences of Activated Tungsten Inert Gas (ATIG) Welding Applied on 1.4301 Type Stainless Steel Plates

2007 ◽  
Vol 537-538 ◽  
pp. 63-70 ◽  
Author(s):  
Tamás Sándor ◽  
János Dobránszky
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Tig Welding ◽  
Steel Plates ◽  
Inert Gas ◽  
Tungsten Inert Gas Welding ◽  
Tungsten Electrode ◽  
High Productivity ◽  
Activating Flux ◽  
Type Stainless Steel

The TIG welding has a high disadvantage against the substantially high productivity welding procedures. This is why there were continuously going on several trials to improve the productivity of the TIG welding. The Activated Tungsten Inert Gas welding (ATIG welding) is one of these trials. Application experiments of ATIG welding on austenitic stainless steel plates will be presented. The main problems which appear when using the ATIG welding are the choosing of tungsten electrode, the suggested fitting of parts for the joining, portioning of the activating flux and the sensitivity for the measure of flux. They are extremely important to apply the ATIG welding and the results will be presented by this work. In the second half of this paper the comparison of the productivity differences between TIG and ATIG welding; mechanical properties, microstructure and corrosion resistance of welded joints will continue. Finally the evaluating the results and trying to classify the ATIG welding amongst the modern and most productive welding procedures is detailed. Furthermore advises for using the ATIG welding for suitable applications are represented.

Experimental Investigations for Reducing Effect of Sensitization in Tungsten Inert Gas Welding

2008 ◽  
Author(s):  
Rupinder Singh ◽  
Sehijpal Singh
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Austenitic Stainless Steel ◽  
Inert Gas ◽  
Experimental Investigations ◽  
Welding Parameters ◽  
Work Piece ◽  
Tungsten Inert Gas Welding ◽  
Stainless Steel 316L

Stainless steels are considered to have very good resistance to general and localized corrosion due to their chromium content. This property of corrosion resistance constitutes the main criterion for selecting austenitic grades of steels for service in the chemical, nuclear and aerospace industries although their mechanical properties are relatively modest. However, this resistance can degrade when structural components manufactured from these steels are used in a chemically aggressive environment, especially when service involves exposure to high temperatures like in welding. This exposure gives rise to precipitation of chromium carbides producing chromium depletion at grain boundaries that brings about the inter-granular corrosion or sensitization of these materials. Austenitic stainless steel (316L) is one of the corrosion resistance material used extensively in the oil production, chemical and power generation industries for transportation and reservoir of corrosive products. In spite of its corrosion resistance property there exist severe problems of sensitization. In the present work an effort has been made to reduce the effect of sensitization in Tungsten Inert Gas welding of Austenitic stainless steel (316L). Three welding procedures (namely conventional, back step and skip welding) in Tungsten Inert Gas welding have been used to control exposure time of the weld pool to higher temperatures, in order to study the effect of sensitization on mechanical properties (such as tensile strength, yield strength, percentage elongation and hardness). The results of this study suggested that the better mechanical properties were attained by the skip welding procedure and recommended welding parameters are 90 Amp current and 10 L/min of gas flow rate for a 5 mm thick work piece. Noticeable change in amount/extent of sensitization was observed using a scanning electron microscope (SEM) analysis within the various welding specimens prepared using the various procedures. Further mechanical properties (like strength and hardness) have been correlated with the extent of sensitization, which show remarkable decreases when the amount/extent of sensitization increases.

AISI TYPE 303 and 303Se

Alloy Digest ◽  
1961 ◽  
Vol 10 (12) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Stainless Steels ◽  
Heat Treating ◽  
Steel Mills ◽  
Temperature Performance ◽  
Aisi Type

Abstract AISI Types 303 and 303 Se austenitic chromium nickel stainless steels to which elements have been added to improve machining and non-seizing characteristics. They are the most readily machinable of all the austenitic chromium nickel grades and are suitable for use in automatic screw machines. They are widely used to minimize seizing and galling. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-126. Producer or source: Stainless steel mills.

ENDURO 19-9SMo

Alloy Digest ◽  
1968 ◽  
Vol 17 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Thermal Treatment ◽  
Physical Properties ◽  
Surface Treatment ◽  
Heat Treating ◽  
Temperature Performance ◽  
Type Stainless Steel

Abstract ENDURO 19-9-SMo is a 19-9 type stainless steel containing molybdenum to greatly increase its resistance to attack by most chemicals. It is nonmagnetic and does not respond to thermal treatment for hardening. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties as well as fracture toughness and creep. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-207. Producer or source: Republic Steel Corporation.

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