Solutions for Submerged Arc Welding
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Welding and Joining Guidelines
Welding and Joining Guidelines The HASTELLOY® and HAYNES® alloys are known for their good weldability, which is defined as the ability of a material to be welded and to perform satisfactorily in the imposed service environment. The service performance of the welded component should be given the utmost importance when determining a suitable weld process or procedure. If proper welding techniques and procedures are followed, high-quality welds can be produced with conventional arc welding processes. However, please be aware of the proper techniques for welding these types of alloys and the differences compared to the more common carbon and stainless steels. The following information should provide a basis for properly welding the HASTELLOY® and HAYNES® alloys. For further information, please consult the references listed throughout each section. It is also important to review any alloy- specific welding considerations prior to determining a suitable welding procedure. The most common welding processes used to weld the HASTELLOY® and HAYNES® alloys are the gas tungsten arc welding (GTAW / “TIG”), gas metal arc welding (GMAW / “MIG”), and shielded metal arc welding (SMAW / “Stick”) processes. In addition to these common arc welding processes, other welding processes such plasma arc welding (PAW), resistance spot welding (RSW), laser beam welding (LBW), and electron beam welding (EBW) are used. Submerged arc welding (SAW) is generally discouraged as this process is characterized by high heat input to the base metal, which promotes distortion, hot cracking, and precipitation of secondary phases that can be detrimental to material properties and performance. The introduction of flux elements to the weld also makes it difficult to achieve a proper chemical composition in the weld deposit. -
Submerged Arc Welding
SAMPLE Welding Process Training Series Submerged Arc Welding 265558 Submerged Arc Welding CC 2014_EN.indd 1 4/17/15 15:35 SAFETY Safety in Welding, Cutting, and Allied Processes, CSA Standard W117.2, from Canadian Standards Association, Standards Sales, 5060 Arc Spectrum Way, Suite 100, Ontario, Canada L4W 5NS (Phone: 800-463- Welding 6727, website: www.csa-international.org). Safe Practice For Occupational And Educational Eye And Face Protec- and Cutting tion, ANSI Standard Z87.1, from American National Standards Insti- tute, 25 West 43rd Street, New York, NY 10036 (Phone: 212-642-4900, the website: www.ansi.org). Safe Way! Standard for Fire Prevention During Welding, Cutting, and Other Hot Work, NFPA Standard 51B, from National Fire Protection Association, Quincy, MA 02269 (Phone: 1-800-344-3555, website: www.nfpa.org.) OSHA, Occupational Safety and Health Standards for General Indus- try, Title 29, Code of Federal Regulations (CFR), Part 1910, Subpart As in all occupations, safety is paramount. Because there are Q, and Part 1926, Subpart J, from U.S. Government Printing Of- numerous safety codes and regulations in place, we recommend fice, Superintendent of Documents, P.O. Box 371954, Pittsburgh, that you always read all labels and the Owner’s Manual carefully PA 15250-7954 (Phone: 1-866-512-1800) (There are 10 OSHA Re- before installing, operating, or servicing the unit. Read the safety gional Offices—phone for Region 5, Chicago, is 312-353-2220, information at the beginning of the manual and in each section. website: www.osha.gov). Also read and follow all applicable safety standards, especially Booklet, TLVs, Threshold Limit Values, from American Confer- ANSI Z49.1, Safety in Welding, Cutting, and Allied Processes. -
1. Exposure Data
1. EXPOSURE DATA 1.1 Description of major welding are used as part of the welding process (e.g. the processes and materials shielding gas) (ISO, 2009). While there are many welding processes Welding is a broad term for the process routinely employed in occupational settings, the of joining metals through coalescence (AWS, most common arc welding processes are manual 2010). Welding techniques tend to be broadly metal arc (MMA, ISO No. 111), gas metal arc classified as arc welding or gas welding. Arc (GMA, ISO No. 13), flux-cored arc (FCA, ISO Nos welding uses electricity to generate an arc, 114 and 136), gas tungsten arc (GTA, ISO No. 14), whereas gas or oxyfuel welding (ISO 4063:2009 and submerged arc (SA, ISO No. 12) (Table 1.2 process numbers 3, 31, 311, 312, and 313) uses fuel and Table 1.3). Electric resistance welding (ER, gases such as acetylene or hydrogen to generate ISO Nos 21 and 22) is also commonly used for spot heat. Welding results in concurrent exposures or seam welding, and uses electric currents and including welding fumes, gases, and ionizing force to generate heat. In occupational settings, and non-ionizing radiation, and coexposures these processes are most commonly used to weld from other sources such as asbestos and solvents mild steel (MS, low carbon) or stainless steel (SS). (Table 1.1). Flame cutting (ISO No. 81), the process of using Welding fumes are produced when metals oxygen (O) and a fuel to cut a metal, is a closely are heated above their melting point, vapourize related process that is often grouped occupation- and condense into fumes. -
AC/DC Submerged Arc Welding
THE LINCOLN ELECTRIC COMPANY NEXTWELD® AC/DC Submerged Arc Welding Processes >>> MODULAR For over 50 years, Lincoln Electric has offered its submerged arc welding (SAW) customers high The Power Wave AC/DC1000 SD power source deposition rates, reliable penetration, and smooth is designed for easy paralleling, overcoming the bead appearance. problems typically associated with synchronization of AC waveforms for increased amperage Now, Lincoln brings you an advance in SAW technology that applications. provides the option of variable polarity. Changes in the >>> balance of positive and negative polarity of the AC waveform MULTI-ARC enable the operator to change penetration and deposition, without changing the current or voltage settings. AC/DC welding is designed for applications that require up to five independently controlled Lincoln’s AC/DC submerged arc process with the Power welding arcs. Wave® power source gives the operator real-time control. >>> Instead of making a weld, stopping and re-programming EASY INTEGRATION the new parameters, and running a test weld to make sure they worked, changing the weld characteristics is as easy as Digital Communications provide a simple solution turning a knob.. for the integration of the welding power source to the motion controlling Programmable Logic Controller (PLC). >>> INCREASED PROCESS CONTROL Digital Communications also enable the use of software tools to record the actual welding values for each weld as well as monitoring the status of the welding system. >>> WAVEFORM CONTROL TECHNOLOGY® The Power Wave AC/DC1000 SD power source is equipped with factory-programmed procedures for fast setup. The Power Wave® AC/DC 1000® SD power source takes submerged arc welding to the next level. -
Chemical and Physical Properties of Fluxes for SAW of Low-Carbon Steels
13 Chemical and Physical Properties of Fluxes for SAW of Low-Carbon Steels Ana Ma. Paniagua-Mercado and Victor M. Lopez-Hirata Instituto Politécnico Nacional (ESFM-ESIQIE) Mexico 1. Introduction The submerged-arc welding of steels has been used since 1930. It is well known that the mechanical properties of steel weldments depend on the chemical compositions of electrodes and fluxes. The development of welding electrodes has been based on practical experiences. The study of welding deposits by means of physical metallurgy permitted to develop electrodes and fluxes for SAW process of steels. In contrast, the use of chemical and physical properties of fluxes for the development of welding process started in the 70´s. (Shah, 1986). Most of the works concerning with the fluxes for SAW process have been focused on its effect on microstructure and mechanical properties. Likewise, it has been interesting the study of the thermochemical and electrochemical reactions that occur at the welding pool which are very important for the transferring of metallic elements to the welds. In addition to the stated above, the electrode coverings is also a very important aspect to obtain weld metal with good mechanical properties. The covering materials are fluxes which are composed of different mineral chemical compounds such as, oxides, fluorides and carbonates (Singer & Singer, 1979). The firing and sintering process of fluxes during welding electrode processing promotes chemical reactions and phase transformations of these minerals. All these factors determine the valence or electric charge of the different elements which are deposited to the weld metal. All the oxides from flux may contribute to the dissolution process of different metallic elements and oxygen in the welding pool. -
Welding Innovation Vol. XVI, No.1, 1999
Tribute to a Leader The James F. Lincoln Arc Welding Foundation was incorporated in 1936 as a nonprofit organization “…to encourage and stimu- late scientific interest in, and scientific study, research and edu- cation in respect of, the development of the arc welding industry…” During Dick's tenure as Executive Director of the Foundation, he enhanced the organization's effectiveness by: • Supporting the School/Shop, College and Professional Award Programs with publicity and cash grants that have made them among the finest such programs in the United States • Expanding the program of donating complete libraries of books Richard S. Sabo published by the Foundation to high schools and colleges • In 1984, initiating publication of Welding Innovation, a periodical which now has an international circulation in excess of 50,000 Some people are simply irreplaceable. My long time friend and • In 1988, appointing the first International Assistant Secretaries colleague, Richard S. Sabo is a case in point. After 31 years of the Foundation with The James F. Lincoln Arc Welding Foundation, and 34 years • Establishing creative partnerships with the American and at The Lincoln Electric Company, Dick is retiring. He will be suc- Australian Institutes of Steel Construction to co-sponsor ceeded, but never replaced. welded bridge award programs For the last three decades, it has been my privilege to watch Dick • Continuing the Foundation's ambitious program of publishing inspire, educate and motivate a truly amazing range of people, welding manuals and design texts from Lincoln employees to vocational school students, from top industry leaders to Foundation Award program participants, and The above accomplishments were very much a part-time activity for from college professors to members of Congressional committees. -
Chapter 6 Arc Welding
Revised Edition: 2016 ISBN 978-1-283-49257-7 © All rights reserved. Published by: Research World 48 West 48 Street, Suite 1116, New York, NY 10036, United States Email: [email protected] Table of Contents Chapter 1 - Welding Chapter 2 - Fabrication (Metal) Chapter 3 - Electron Beam Welding and Friction Welding Chapter 4 - Oxy-Fuel Welding and Cutting Chapter 5 - Electric Resistance Welding Chapter 6 - Arc Welding Chapter 7 - Plastic Welding Chapter 8 - Nondestructive Testing Chapter 9 - Ultrasonic Welding Chapter 10 - Welding Defect Chapter 11 - Hyperbaric Welding and Orbital Welding Chapter 12 - Friction Stud Welding Chapter 13 WT- Welding Joints ________________________WORLD TECHNOLOGIES________________________ Chapter 1 Welding WT Gas metal arc welding ________________________WORLD TECHNOLOGIES________________________ Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld pool) that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld. This is in contrast with soldering and brazing, which involve melting a lower-melting-point material between the workpieces to form a bond between them, without melting the workpieces. Many different energy sources can be used for welding, including a gas flame, an electric arc, a laser, an electron beam, friction, and ultrasound. While often an industrial process, welding can be done in many different environments, including open air, under water and in outer space. Regardless of location, welding remains dangerous, and precautions are taken to avoid burns, electric shock, eye damage, poisonous fumes, and overexposure to ultraviolet light. -
Structural Steel Design Awards 2016
www.newsteelconstruction.com STRUCTURAL STEEL DESIGN AWARDS 2016 No 9 October 2016 24 Vol In this issue Cover Image Harlech Castle Footbridge Concept designer: Mott MacDonald Structural Engineer: David Dexter Associates Steelwork Contractor: S H Structures Ltd Main Contractor: RL Davies & Son Ltd Client: Cadw October 2016 Vol 24 No 9 EDITOR Editor’s comment The 2016 Structural Steel Design Awards judges saw a rise in the Nick Barrett Tel: 01323 422483 [email protected] 5 technical challenges being overcome by designers and steelwork contractors in this DEPUTY EDITOR year’s awards, writes Editor Nick Barrett. Martin Cooper Tel: 01892 538191 [email protected] PRODUCTION EDITOR News The Structural Steel Design Awards (SSDA) celebrated its 48th year with a Andrew Pilcher Tel: 01892 553147 [email protected] 6 ceremony at the Museum of London. PRODUCTION ASSISTANT Alastair Lloyd Tel: 01892 553145 [email protected] Sector Focus: Computer Software The computer software sector forms an integral COMMERCIAL MANAGER part of steel design and construction. Fawad Minhas Tel: 01892 553149 10 [email protected] NSC IS PRODUCED BY BARRETT BYRD ASSOCIATES Structural Steel Design Awards A special feature detailing all of this year’s winners ON BEHALF OF THE BRITISH CONSTRUCTIONAL 11 and shortlisted projects. STEELWORK ASSOCIATION AND STEEL FOR LIFE IN ASSOCIATION WITH THE STEEL CONSTRUCTION INSTITUTE Introduction and Judges David Lazenby, Chairman of the SSDA judging panel said it The British Constructional Steelwork Association Ltd was reassuring that there was an increase in the number of submissions for the 4 Whitehall Court, Westminster, London SW1A 2ES 12 Telephone 020 7839 8566 Awards scheme this year. -
Handbook on Welding Techniques
dsoy dk;Zky;hu mi;ksx gsrq (For Official Use Only) Hkkjr ljdkj GOVERNMENT OF INDIA jsy ea=ky; MINISTRY OF RAILWAYS HANDBOOK ON WELDING TECHNIQUES END USER: Newly Recruited/ Promoted Welders CAMTECH/ E/ 14-15/ Welding/ 1.0 February, 2015 egkjktiqj Xokfy;j & 474 005 , Maharajpur, GWALIOR - 474 005 HANDBOOK ON WELDING TECHNIQUES QUALITY POLICY “To develop safe, modern and cost effective Railway Technology complying with Statutory and Regulatory requirements, through excellence in Research, Designs and Standards and Continual improvements in Quality Management System to cater to growing demand of passenger and freight traffic on the railways”. FOREWORD Welding is a very common metal joining technology and it is widely used in Railways in various production and maintenance units. Railways recruit ITI qualified welders as well as promote staff to welder category by providing appropriate training. CAMTECH has prepared this handbook on “Welding Techniques” to provide basic information on the subject. This handbook contains various terms used in electric arc and gas welding. I hope this handbook will prove to be useful for the newly recruited and promoted welders as well as working welders for updating their knowledge. CAMTECH, Gwalior A. R. Tupe Date : 23rd Feb, 2015 Executive Director PREFACE Welding is the most commonly used method of joining and repairing metallic structures permanently. The basic knowledge of weld procedures, weld joints, different techniques is essential to upgrade the workmanship of a welder and to improve productivity in an industry. CAMTECH has prepared this handbook on “Welding Techniques” by compiling useful information from various sources and books available on the subject. -
Steel Designers'
GORENC BRANKO RON ARUN This seventh, thoroughly updated edition of Steel Designers’ Handbook TINYOU will be an invaluable tool to all GORENC TINYOU SYAM practising structural engineers, as well as engineering students. SYAM It introduces the main concepts relating to design in steel and STEEL replaces the sixth edition, published in 1996. This edition has been prepared in response to the new structural Design Actions Standard, AS/ANZ 1170, as well as feedback from users. It is based on Australian Standard (AS) 4100: 1998 and provides added background to that Standard. STEEL The book makes extensive use DESIGNER of worked numerical examples to demonstrate the methods of DESIGNERS’ calculating the capacities of structural elements. These examples have been extensively revised from the previous edition, with further examples added. The worked HANDBOOK examples are cross-referenced to the relevant clauses in AS 4100: 1998. Between them, the authors have close to 100 years’ experience of solving engineering problems. All three have practised in all phases of the design and specifi cations of steel structures ranging from commercial S to institutional structures; while two, Arun Syam and Branko Gorenc, ’ have served on numerous Standard Australia committees related to steel HAND construction. BOOK UNSW PRESS EDITION7 UNSW PRESS EDITION7 steeldesigncover.indd 1 17/6/05 3:34:35 PM 1106 SDHB 00-04 Final 8/6/05 12:03 PM Page i STEEL DESIGNERS’ HANDBOOK BRANKO E GORENC is a Fellow of The Institution of Engineers, Australia, and holds a degree in Civil Engineering from the University of Zagreb, Croatia. He has been practising in the field of structural steel design for four decades, gaining considerable expertise in the areas of conceptual framing design and analysis, member and connection design. -
Nonmetallic Inclusions in HSLA Steel Weldments
Calhoun: The NPS Institutional Archive Theses and Dissertations Thesis Collection 1989-12 Nonmetallic inclusions in HSLA steel weldments Douglas, Brent A. Monterey, California. Naval Postgraduate School http://hdl.handle.net/10945/27164 :">op. NAVAL POSTGRADUATE SCHOOL Monterey, California THESISn NONMETALLIC INCLUSIONS IN HSLA STEEL WELDMENTS by Brent A. Douglas December, 1989 Thesis Advisor: Alan G. Fox Approved for public release; distribution is unlimited. T247876 Unclassified REPORT DOCUMENTATION PAGE «. MPOAT SECURITY CLASSIFICATION lb RESTRICTIVE MARKINGS Unclassified *. SECURITY CLASSIFICATION AUTHORITY 3 DISTRIBUTION/ AVAILABILITY OF REPORT Approved for public release, m. DECLASSIFICATION / DOWNGRADING SCHEDULE distribution is unlimited. I. PERFORMING ORGANIZATION REPORT NUMBER(S) 5 MONITORING ORGANIZATION REPORT NUMBER(S) it. NAME OF PERFORMING ORGANIZATION 6b OFFICE SYMBOL 7« NAME OF MONITORING ORGANIZATION (If iPQtiCi&t) School Naval Postgraduate School 69 Naval Postgraduate k. AOORESS {Cty. Stilt, and ZIP Cod*) 7b. AOORESS (Cty, Stir*. and ZIP Cod*) Monterey, CA 93943-5000 Monterey, CA 93943-5000 It. NAME OF FUNDING /SPONSORING 8b. OFFICE SYMBOL 9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER ORGANIZATION (if applicable) Ic AOORESS (City, State, and ZIP Code) 10 SOURCE OF FUNDING NUMBERS PROGRAM PROJECT TASK WORK UNIT ELEMENT NO. NO. NO ACCESSION NO. II. TITLE (Include Security Classification) Nonmetallic Inclusions In HSLA Steel Weldments 12. PERSONAL AUTHOR(S) Douglas, Brent A. 13b. TIME COVERED OATE OF REPORT ( Year. Month, Day) 15 PAGE COUNT 13«. TYPE OF REPORT 102 Master's Thesis FROM TO £ December 1989 1i. SUPPLEMENTARY NOTATION THE VIEWS EKPRESSEV IN THIS THESIS ARE THOSE OF THE AUTHOR AUV VO NOT REFLECT THE OFFICIALtrriLiAL POLICY OR POSITION OF THE VEPARUiENT OF VEFEUSE OR THE U.S. -
1 Intro and Contents
Steel Buildings Publication No. 35/03 Steel Buildings Publication No. 35/03 Apart from any fair dealing for the purposes of research The British Constructional Steelwork Association or private study or criticism or review, as permitted Limited (BCSA) is the national organisation for the steel under the Copyright Design and Patents Act 1988, this construction industry: its Member companies publication may not be reproduced, stored or undertake the design, fabrication and erection of transmitted in any form by any means without the prior steelwork for all forms of construction in building and permission of the publishers or in the case of civil engineering. Associate Members are those reprographic reproduction only in accordance with the principal companies involved in the purchase, design terms of the licences issued by the UK Copyright or supply of components, materials, services related to Licensing Agency, or in accordance with the terms of the industry. Corporate Members are clients, licences issued by the appropriate Reproduction professional offices, educational establishments which Rights Organisation outside the UK. support the development of national specifications, quality, fabrication and erection techniques, overall Enquiries concerning reproduction outside the terms industry efficiency and good practice. stated here should be sent to the publishers, The British Constructional Steelwork Association Ltd at the The principal objectives of the Association are to address given below. promote the use of structural steelwork; to assist specifiers and clients; to ensure that the capabilities and Although care has been taken to ensure, to the best of activities of the industry are widely understood and to our knowledge, that all data and information contained provide members with professional services in herein are accurate to the extent that they relate to technical, commercial, contractual and quality either matters of fact or accepted practice or matters assurance matters.