MCCCD Program Description

GMAW and GTAW Welding

Course: WLD206AA

First Term: 2018 Summer

Lec + Lab 5.0 Credit(s) 8.0 Period(s) 7.1 Load
Subject Type: Occupational
Load Formula: S - Standard Load

Description: Instruction in theory and practice of Gas Metal Arc Welding (GMAW) and Gas Tungsten Arc Welding (GTAW) on tungsten inert gas and wire feed welding. Basic welding procedures on ferrous and nonferrous metals. Set up and operation of all types of machines used in Tungsten Inert Gas (TIG) and Metal Inert Gas (MIG) welding.

MCCCD Official Course Competencies
1. Demonstrate weld testing positions. (I) 2. Identify testing procedures as they relate to material analysis. (II) 3. Describe different methods of metal identification. (III) 4. Describe different types of metal testing methods used in industry. (IV) 5. Identify welding symbols used on blueprints. (V) 6. Design and layout templates used for welding. (VI) 7. Describe the process of tig welding and the advantages of the tig welding process. (VII) 8. Explain different weld machines and related equipment. (VIII) 9. Demonstrate the process of setting up welding procedures. (IX) 10. Identify the different types of alloys and the applications of each. (X) 11. Describe the mig welding process. (XI) 12. Explain the various parts of a mig welding machine. (XII) 13. Perform welding procedure as related to mig welding. (XIII) 14. Identify the different types of alloys and their application as related to MIG welding. (XIV) 15. Perform a American Welding Society (AWS) certification test in two positions 3G (vertical) and 4G (overhead) with the mig welding process, all plates will be x-rayed. (XV) 16. Perform a military specification certificate test in the (flat) 1G position with alloys, aluminum, stainless steel, all plates will be x-rayed. (XVI)
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. Testing Positions A. Flat B. Horizontal C. Vertical D. Overhead II. Testing Procedures A. Joint Types B. Position of Work C. Material Analysis D. Testing Method E. Allowable Tolerance III. Metal Identification A. Appearance B. Weight C. Spark Test D. Hardness E. Magnetism F. Cross-Sectional Break Area IV. Test Methods A. Guided Bend Test B. Tensile Strength Test C. X-Ray Examination D. Ultrasonic Test E. Pressure Test F. Static Load Test V. Blueprint Symbols A. Joint Symbol Identification B. Weld Symbol Identification C. Weld Location D. Weld Duration Signs E. Detail Information F. Material List VI. Layout A. Short Method Pipe B. Templates Pipe C. Locking Methods D. Measurements E. Weld Sequence VII. Description of Process A. Arc Stream B. Shielding of Molten Metal C. Adding of Filler Metal VIII. Equipment A. AC Machine B. DC Machine C. Torches D. Tungsten Electrodes E. Electrical System F. Gas System G. Water System IX. Procedures A. Joint Design B. Cleaning C. Weld Backing D. Welding Current E. Weld Speed F. Arc Length G. Tungsten Electrode Diameter H. Welding Techniques I. Gas Flow Rate-Cubic Foot per Hours (CFH) J. Cup Sizes K. Rod Composition L. High Frequency Current M. Striking the Arc N. Fouling of the Electrode X. Application A. Aluminum B. Stainless Steel C. Magnesium D. Carbon Steels E. Cast Iron F. Hardfacing G. Copper H. Copper Alloys I. Tool Steel XI. Description of Process A. Arc stream B. Shielding of arc and molten puddle C. Mechanical adding of filler rod XII. Equipment (MIG) A. DC Generator B. Transformer rectifier C. Wire feeder D. Wire feed gun E. Spooled wire F. Electrical system G. Shielding gas system H. Possible water system XIII. Procedures (MIG) A. Joint design B. Cleaning C. Wire diameter D. Voltage E. Wire speed - amperage F. Welding techniques G. Gas flow rate - CFH H. Nozzle size I. Drive roll pressure XIV. Application (MIG) A. Aluminum B. Stainless steel C. Carbon steels D. Hardfacing E. Buildup work F. High speed production XV. Certification MIG (American Welding Society) A. Carbon steel set-up B. Vertical C. Overhead D. X-ray E. Procedure qualification XVI. Certification Tig (Military Specifications) A. Aluminum set-up B. Stainless steel set-up C. Flat position (1G) D. X-ray E. Procedure qualification

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.