WELD 0002B. Gas Metal Arc Welding of Stainless Steel on Sheet and Plate

Units: 2
Prerequisite: Completion of WELD 2A with grade of "C" or better
Hours: 72 (18 lecture, 54 laboratory)
Covers equipment, metal preparation, and welding of stainless steels in all positions using Gas Metal Arc Welding. Instruction in equipment setup for different metals, filler selection, material identification, and welding techniques using Gas Metal Arc Welding. Students will learn to read and correctly complete welding procedures performed in industry. Helps prepare students for employment in high demand jobs. (not transferable)

WELD 0002B - Gas Metal Arc Welding of Stainless Steel

http://catalog.sierracollege.edu/course-outlines/weld-0002b/

Catalog Description Prerequisite: Completion of WELD 2A with grade of "C" or better Hours: 72 (18 lecture, 54 laboratory) Description: Covers equipment, metal preparation, and welding of stainless steels in all positions using Gas Metal Arc Welding. Instruction in equipment setup for different metals, filler selection, material identification, and welding techniques using Gas Metal Arc Welding. Students will learn to read and correctly complete welding procedures performed in industry. Helps prepare students for employment in high demand jobs. (not transferable) Course Student Learning Outcomes CSLO #1: Explain the different types of respiratory protection associated with welding and cutting fumes and describe correct applications of each type of respiratory protection equipment. CSLO #2: Compare and contrast the metallurgical properties and common applications of austenitic, ferritic, martensitic, and duplex stainless steels. CSLO #3: Explain the 4 transfer modes of gas metal arc welding, describing the differences and uses as applied to stainless steel welding. CSLO #4: Apply welding procedures and demonstrate proper manipulative skills to achieve proper fusion when welding stainless steel using GMAW in multiple welding positions. Effective Term Fall 2025 Course Type Credit - Degree-applicable Contact Hours 72 Outside of Class Hours 36 Total Student Learning Hours 108 Course Objectives Lecture Objectives Intermediate Safety Topics Describe and compare all types of personal respiration safety devices. Identify & remediate hazardous fumes and particulate in processed and welded material, especially stainless steels Locate Safety Data Sheets and identify key health and environmental hazards such as hexavalent chromium Evaluate safety issues as they pertain to shop safety, industrial safety, and personal safety and apply appropriate safety Discuss and analyze correct safety practices when using the various types of welding or cutting equipment and general shop equipment such as grinders. Explain proper mitigation procedures for reducing and eliminating health hazards associated with welding stainless steels Assessing the weld puddle appearance to adjust Essential Variables During the Welding Process Identify when and how much each of the following parameters need adjustment based on weld puddle and bead appearance when welding stainless steel Wirefeed Speed and Voltage Contact Tip to Work Distance Direction of travel & travel angle Work Angle Travel Speed Electrode Manipulation Gas Selection and adjustment as applicable Explain what factors affect each of the afore mentioned parameters Set Up and Use Advanced Functions on Welding Equipment for Stainless Steel Set up and make adjustments to the pulse function to produce quality weldments Set up and make adjustments for spray mode to produce quality weldments Explain how arc penetration changes based on polarity Determine which polarity should be used in various situations and explain why Considerations for GMAW on Stainless Steel Discuss importance of cleaning and cross-contamination Analyze proper fit up, tacking sequences, and heat distortion issues Compare and contrast welding thin vs thick stainless steel Discuss electrode selection and polarity for welding on stainless steel Determine gas selection for GMAW on stainless steel List pros and cons of using GMAW to weld stainless steel Application of Welding Stainless Steel in Horizontal, Vertical, and Overhead Positions on thin and thick material Discuss, compare and contrast various welding techniques employed when welding in horizontal, vertical, and overhead positions Apply knowledge of welding in horizontal, vertical, and overhead positions to various joint types Bench Grinder, Bench Sander, Air Tool Safety and operation Identify key parts and safety features of bench grinder, bench sander, and/or various air tools Demonstrate safe use of bench grinder, bench sander, and/or various air tools List, then compare and contrast various abrasive wheels, discs, and pads and their uses. Select the correct abrasive for a given task and produce a quality finish Types of Stainless Steels Explain the differences between the following stainless steels and their common applications and welding considerations Austenitic Ferritic Martensitic Duplex Four Modes of Transfer as applied to Stainless Steels Recall and describe the four GMAW modes of transfer (Short Circuit, Globular, Pulsed-Spray, and Spray) Explain which modes of transfer are used for welding stainless steel and why Filler Metal and Material Specifications Describe the numbering system for stainless steel filler metals Use the numbering system to identify alloying elements in the filler metal Discuss  the effects of alloying elements in the weld metal Explain the difference between austenitic, ferritic, martensitic, and duplex stainless steel alloys Groove Weld Profiles and Acceptability Identify the parts of a groove weld Draw and label the following groove weld profiles in a butt joint Acceptable profile Insufficient size (underfill) Excessive convexity Undercut Overlap Slag inclusion Incomplete fusion Included porosity Cracks Label which 9 groove weld profiles are desired, acceptable, sometimes unacceptable, and always unacceptable based on severity of discontinuity Understanding Groove Weld Symbols Explain the difference between a “weld symbol” and a “welding symbol” Explain the importance of arrow and other side weld symbols Draw or match the following groove weld symbols and their corresponding joint configurations Single Bevel Double Bevel Single J Double J Single V Double V Single U Double U Identify all possible combinations of each basic groove weld type and weld joint Butt Joint: square, bevel, double bevel, J, double J, V, Double V, U, Double U Tee Joint: square, bevel, double bevel, J, double J Lap Joint: square, bevel, double bevel, J, double J Corner Joint: square, bevel, double bevel, J, double J, U, V Edge Joint: square, bevel, J, U, V Understanding Groove Welding Symbols Interpret all aspects of a groove welding symbol (S) Depth of Bevel; Size or Strength of welds (E) Groove Weld Size (A) Groove Weld Angle (R) Root Opening Match welding symbol examples to their corresponding joint configuration design Discuss and analyze pros and cons of using each of these combinations on a variety of welding applications Discontinuities and Defects Associated with Gas Metal Arc Welding of Stainless Steels Identify which of the following are discontinuities or defects. Carbide Precipitation (Sugaring) Undesirable weld profile Overlap Undercut. Underfill Over run Under run Cracks Porosity Lack of Fusion Explain common causes and corrective actions for each discontinuity or defect. American Welding Society Specifications of Welding Positions by Degree Range Values Define rotation of face and inclination of axis Understand how rotation of face and inclination axis ranges and limits define welding positions for fillet and groove welds independently Create a resume and cover Letter with welding experience listed Laboratory Objectives Lab Assignments and/or Lab Projects Recall common terminology and concepts used in the application of welding operations and apply to the lab setting Employ pre-weld metal preparation techniques to ensure weld quality Demonstrate pre-weld procedures and apply correct welding parameter adjustment tasks. Apply foundational skills to weld carbon steel to industry-based-acceptance criteria Apply demonstrated techniques to weld beads with each welding process used in this course on the assigned student projects Perform the following Lab Assignments using ER-308 and ER-309 filler wire as appropriate: Repeating Corner Joint: 1/8" base metal, 2F, 3F down, and 4F. Repeating Lap Joint: 1/8" base metal, 2F, 3F down, and 4F. Repeating Tee Joint: 1/8" base metal, 2F, 3F down, and 4F. Repeating Butt Joint: 1/8" base metal, 2F, 3F down, and 4F. Extra Credit: Repeating Edge Joint: 1/8" base metal, 2F, 3F down, and 4F. Combo Joint: 1/8" base metal Repeating Corner Joint: 14ga base metal, 2F, 3F down, and 4F. Repeating Lap Joint: 14ga base metal, 2F, 3F down, and 4F. Repeating Tee Joint: 14ga base metal, 2F, 3F down, and 4F. Repeating Butt Joint: 14ga base metal, 2F, 3F down, and 4F. Extra Credit: Repeating Edge Joint: 16ga base metal, 2F, 3F down, and 4F. Combo Joint: 14ga base metal Repeating Corner Joint: 1/4" base metal, 2F, 3F down, and 4F. Repeating Lap Joint: 1/4" base metal, 2F, 3F down, and 4F. Repeating Tee Joint: 1/4" base metal, 2F, 3F down, and 4F. Repeating Butt Joint: 1/4" base metal, 2F, 3F down, and 4F. Extra Credit: Repeating Edge Joint: 1/4" base metal, 2F, 3F down, and 4F. Combo Joint: 1/4" base metal General Education Information Approved College Associate Degree GE Applicability CSU GE Applicability (Recommended-requires CSU approval) Cal-GETC Applicability (Recommended - Requires External Approval) IGETC Applicability (Recommended-requires CSU/UC approval) Articulation Information Methods of Evaluation Essay Examinations Example: Explain the difference between a flare bevel and a flange joint? Grade based on industry standard. Objective Examinations Example: When looking at a welding symbol, the number located to the left of the weld symbol denotes what? A) Weld Length (wrong) B) Weld Size (correct) C) Groove angle (wrong) D) Bevel angle (wrong) Projects Example: During the assembly of assigned project, the student will perform fit up steps and tacking procedures. Grading based on industry standard. Skill Demonstrations Example: Student will perform a groove welding test. Instructor will assess the visual appearance of the weld based upon criteria outlined in "AWS D1.6 Structural Welding of Stainless Steel." If welding test is deemed acceptable per industry standard, then student will receive a passing grade for the assignment. Repeatable No Methods of Instruction Laboratory Lecture/Discussion Distance Learning Lab: With instructor demonstration and oversight, students will apply various welding techniques using Short Circuit, Spray, and Pulsed-Spray Transfers. Following class lecture, video presentation, and lab demonstration, instructor will supervise while students practice how to properly set up the welding equipment for stainless steel welding using GMAW. Lecture: Instructor lecture and student group discussion on the various types and applications of welding modes, such as welding on stainless steel using spray vs pulsed-spray mode. Distance Learning Instructor will use slide show presentation, instructor created video, or lecture presentation on a learning platform to teach about best safety practices in the for personal protective equipment, the weld lab environment, and/or tools & equipment. Students will be given a scenario and expected to list the best safety practices that should be employed and explain why they should be used. Students will submit the assignment via text entry, file upload, video or audio recording. Typical Out of Class Assignments Reading Assignments 1. The student will read chapter from the course text on GMAW transfer modes of short circuit, globular, spray transfer, and related materials and be prepared for classroom discussion. 2. The student will look up the welding parameters for the different wire diameters and compositions to become familiar with the correct machine settings to use and be prepared to discuss in class. 3. The student will read a Welding Procedure Specification and interpret it and be prepared to discuss in class. Writing, Problem Solving or Performance 1. The student will create a report of the different chemical compositions from the reading assignments welding procedures for stainless steel alloys. 2. Students demonstrate their performance of each of the various welds, such as pulsed spray transfer, on lab assignments during each class meeting. 3. Students will be given a welding problem prompt and be asked to write a corrective action in the form of a Welding Procedure Specification. Other (Term projects, research papers, portfolios, etc.) Required Materials Welding Principles and Practices Author: Edward R. Bohnart Publisher: McGraw Hill Publication Date: 2017 Text Edition: 5th Classic Textbook?: OER Link: OER: GMAW / FCAW Handbook Author: Minnick, Mosman Publisher: Goodheart-Willcox Publication Date: 2023 Text Edition: 2nd Classic Textbook?: No OER Link: OER: Other materials and-or supplies required of students that contribute to the cost of the course.

Advanced Manufacturing

http://catalog.sierracollege.edu/departments/advanced-manufacturing/

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