MCCCD Program Description

Advanced Arc Welding - 4G Certification

Course: WLD208AB

First Term: 2018 Fall

Lec + Lab 5.0 Credit(s) 8.0 Period(s) 8.0 Load
Subject Type: Occupational
Load Formula: T Lab Load

Description: Advanced metallic arc welding emphasizing 4G position welding structural steel in preparation for certification. Includes various test methods. Provides training on machine flame cutting and gouging and arc air cutting and gouging.

MCCCD Official Course Competencies
1. Explain various types of power supplies and correct set-up procedures for each. (I) 2. Identify various electrodes used in certification and explain their limitations. (II) 3. Describe the correct usage of electrodes and storage according to American Welding Society (A.W.S.) requirements. (III) 4. Perform 4G position welding tasks in preparation for certification test. (IV) 5. Identify all basic types of joint and proper set-up procedures. (V) 6. Perform stringer and weave beads in all joints. (VI) 7. Identify weld defects and their causes and possible corrections. (VII) 8. Describe non-destructive testing methods used in the field and in qualification labs. (VIII) 9. Describe destructive testing methods used in the field and in qualification labs. (IX) 10. Develop test plates, form cutting plate, and correct edge preparation. (X) 11. Perform an American Welding Society (A.W.S.) certification test. (XI)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.

MCCCD Official Course Outline
I. Machines A. Generator B. AC/DC Transformer Rectifier C. Set-Up Procedures II. Electrode-Low Hydrogen A. E7018 B. E7016 C. Limitations III. Electrode Conditions A. Storage-Dry B. Pre-Heated for Use IV. Position of Work A. Flat B. Horizontal C. Vertical D. Overhead V. Types of Joints A. Lap Joint B. Fillet Joint C. Single Vee-Open D. Single Vee with Back-Up Strip VI. Types of Beads A. Stringer B. Weave VII. Weld Defects A. Undercut B. Lack of Fusion C. Lack of Penetration D. Slag Inclusions E. Gas Pockets F. Poor Contour VIII. Test Methods-Non-Destructive A. Dye Penetrant B. Magniflux C. Ultrasonic D. Zyglo IX. Test Methods-Destructive A. Guided Bend Test B. Tensile Strength Test C. Nick-Break Test X. Edge Preparation A. Oxy-Acetylene Cutting B. Oxy-Acetylene Gouging C. Arc Air Cutting XI. American Welding Society (A.W.S.) Certification Test A. Appearance B. Ductility C. Allowable Flaws

MCCCD Governing Board Approval Date: November 28, 2017

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.