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Welding is the most common way of permanently joining metal parts. In this process, heat is applied to metal pieces, melting and fusing them to form a permanent bond. Because of its strength, welding is used in shipbuilding, automobile manufacturing and repair, aerospace applications, and thousands of other manufacturing activities. Welding also is used to join steel beams in the construction of buildings, bridges, and other structures and to join pipes in pipelines, powerplants, and refineries.

The purpose of this welding course is to provide prospective tradesmen with an in-depth view of the theory, principles, methods, and techniques related to modern welding. Welding is a trade that is properly learned only under the supervision of certified teachers. Improper use of tools and equipment can result in injury or death. This online course is not to be regarded as a substitute for a proper apprenticeship. 


Select a Lesson

Lesson 1 — Properties and Uses of Metal

1.1 Metal Properties
1.2 Mechanical Properties
1.3 Metal Types
1.4 Metal Identification

Lesson 2 — Basic Heat Treatment

2.1 Heat-Treating Theory
2.2 Stages of Heat Treatment
2.3 Heat Colors for Steel
2.4 Types of Heat Treatment
2.5 Quenching Media

Lesson 3 — Introduction to Welding

3.1 Welding Processes
3.2 Welding Terminology
3.3 Welded Joint Design
3.4 Welding Positions
3.5 Expansion and Contraction
3.6 Welding Procedures
3.7 Drawings
3.8 Safety

Lesson 4 — Gas Cutting

4.1 Oxygas Cutting Equipment
4.2 Oxygas Cutting Operations
4.3 Judging Cutting Quality
4.4 Safety Precautions

Lesson 5 — Gas Welding

5.1 Oxygas Welding Equipment
5.2 Operation and Maintenance of Oxygas Equipment
5.3 Oxygas Welding Techniques
5.4 Oxygas Welding of Ferrous Metals
5.5 Oxygas Welding of Nonferrous Metals
5.6 Fusion Welding Pipe

Lesson 6 — Soldering, Brazing, Braze Welding, and Wearfacing

6.1 Soldering
6.2 Brazing
6.3 Braze Welding
6.4 Wearfacing

Lesson 7 — Introduction- Shielded Metal-Arc Welding and Wearfacing

7.1 Manual Shielded Metal-Arc Welding
7.2 Equipment Operation and Maintenance
7.3 Shielded-Metal Arc Welding
7.4 Arc Welding Positions
7.5 Pipe Welding
7.6 Wearfacing
7.7 Carbon-Arc Cutting
7.8 Welding Quality Control
7.9 Safety Regulations

Lesson 8 — Introduction- Gas Shielded-Arc Welding

8.1 Gas Tungsten-ArcWelding--GTAW
8.2 GTA Welding Equipment and Supplies
8.3 GTA Welding Preparation
8.4 GTA Welding Procedures
8.5 GTA Welding Common Metals
8.6 Gas Metal-ArcWelding-GMAW
8.7 GMA Welding Equipment and Supplies
8.8 Types of GMA Welding
8.9 GMA Welding Preparation
8.10 GMA Welding Procedures
8.11 GMA Welding Common Metals

The publisher makes no representations or warranties of any kind, including but not limited to, the warranties of fitness for particular purpose, nor are any such representation implied with respect to the material set forth herein, and the publisher takes no responsibility with respect to such material. The publisher shall not be liable for any special consequential or exemplary damages resulting, in whole or in part, from the user’s application of, or reliance upon, this material.

David L. Heiserman, Editor

Copyright ©  SweetHaven Publishing Services
All Rights Reserved

Revised: June 06, 2015