The authors of Welding, 2/e have experience both in industry and in the classroom. Their industry experience brings together knowledge of welding and manufacturing, welding inspection and quality control, power source design, troubleshooting, and customer service. These experiences, combined with more than 50 years of instructional expertise, inspired the development of this textbook and its accompanying technology. David Hoffman Member, American Welding Society Certified Welding Inspector Certified CRAW Technician Fox Valley Technical College An accomplished welder with thousands of hours of hands-on experience, Dave Hoffman has been teaching welding and fabrication for more than 25 years. He assisted with the development of an Associate Degree program in Automated Manufacturing at Fox Valley Technical College and developed an Associate Degree program for Welding Technology. He also received a state grant to redevelop the Metal Fabrication/Welding Diploma program for which he wrote program requirements, competencies, and the complete curriculum. After completing development of the Associate Degrees in Welding Technology, Dave tested and passed the requirements to become an AWS CWI and CWE. Shortly after, he got involved with AWS and was on the B5E Committee, helping to write the B5.5: 2000, Specification for the Qualification of Welding Educators. Most of the welder certifications in that standard were already certified, however some were not. Dave welded GMAW-S vertical up and overhead plates to certify the welding procedure used in the standard. A past winner of the prestigious Lincoln Award, Dave holds a B.S. in Industrial Education and an M.S. in Technical Education from the University of Wisconsin - Stout. He also holds (and wrote) a patent on a product he designed and built in his home shop, and since retiring from teaching, occasionally works as a weld consultant for training and testing in industry. Kevin Dahle Member, American Welding Society Member, Artist Blacksmith Association of North America Certified Welding Inspector Fox Valley Technical College Kevin Dahle has twenty years of experience teaching as a welding instructor at the Associate Degree and Vocational Diploma levels. In addition, he has taught welding apprentices, as well as related welding courses for transportation technology students and agriculture students. Kevin has been involved in training for industry and responsible for overseeing welder and procedure qualifications as an AWS Certified Welding Inspector. Kevin's educational background includes an AS in Industrial Welding Technology, a BS in Vocational, Technical and Adult Education, and an MA in English. His occupational experience in welding consists of production welding, repair welding, structural welding, and quality control - writing and overseeing quality programs for structural welding and boiler repair. David Fisher Member, American Welding Society Certified Welding Inspector Fox Valley Technical College David Fisher has five years of experience teaching as a welding/metal fabrication instructor at the Associate Degree and Vocational Diploma levels. In addition, he has taught welding apprentices, as well as related welding courses for transportation technology students and agriculture students. David has been involved in training for industry and responsible for overseeing welder and procedure qualifications as an AWS Certified Welding Inspector. Prior to his academic career, David worked for Miller Electric Manufacturing Company. He was initially hired to build new inverter welders and eventually joined the service department where he conducted repair, maintenance, and operation of welding power sources and accessories for customers. As an application technician for Tig Industrial Products, David provided information and advice to customers, welding distributors, and salesmen regarding the GTAW and SMAW processes. David holds an AS Degree in Electrical Engineering Technology and is currently working on his BS in Mechanical Engineering.