Lesson Plan
Course Title: Welding
Session Title: Mild Steel Electrode Selection
Time:
3 hours
[Lesson length is subjective and will vary from instructor to instructor]
Performance Objective:
Upon completion of this assignment, the student will be able to choose a rod for a
specific task based upon rod characteristics and results.
Specific Objectives:
Upon completion of this lesson, the learner will be able to:
1. Identify mild steel electrodes for use.
2. Select proper electrodes for specific tasks based on rod characteristics.
Preparation
TEKS Correlations:
This lesson, as published, correlates to the following TEKS. Any changes/alterations
to the activities may result in the elimination of any or all of the TEKS listed.


Welding:
130.323(c)(2)(A)(B)(C)(D)(E)(F)
…explore academic knowledge and skills required for postsecondary
education;
…identify employers' expectations to foster positive customer satisfaction;
…demonstrate the skills required in the workplace such as interviewing skills,
flexibility, willingness to learn new skills and acquire knowledge, selfdiscipline, self-worth, positive attitude, and integrity in a work situation;
…evaluate personal career goals;
…communicate effectively with others in the workplace to clarify objectives; and
…demonstrate skills related to health and safety in the workplace, as specified
by appropriate government regulations.
130.323(c)(3)(A)(B)(C)(D)(E)(F)(G)(H)(I)(J)(K)(L)(M)(N)(O)(P)(Q)
…demonstrate effective communication skills with individuals from varied
cultures such as fellow workers, management, and customers;
…demonstrate mathematical skills to estimate costs;
…demonstrate technical writing skills related to work orders;
…apply accurate readings of measuring devices, both U.S. customary and
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metric;
…accurately use an appropriate tool to make measurements;
…compute measurements such as area, surface area, volume, and perimeter;
…determine how changes in dimension affect geometric figures;
…calculate problems using whole numbers, fractions, mixed numbers, and
decimals;
…use a calculator to perform computations;
…perform conversions between fractions and decimals;
…understand the functions of angles;
…apply right triangle relationships using the Pythagorean Theorem;
…understand the parts of a circle;
…identify the most reasonable mathematical solution using estimation;
…use cross-sections of three-dimensional figures to relate to plane figures;
…describe orthographic views of three-dimensional figures; and
…describe isometric views of three-dimensional figures.
Interdisciplinary Correlations:
English:
110.42(4) – Writing/inquiry/research
 110.42(4)(E)
…use writing as a study tool to clarify and remember identification;


110.42(6) – Reading/word identification/vocabulary development
110.42(6)(A)
…expand vocabulary development through wide reading, listening, and
discussing;
110.42(14) – Listening/speaking/critical listening
110.42(14)(B)
…interpret accurately the speaker’s message;
Instructor/Trainer
References:
The Procedure Handbook of Arc Welding (Lincoln Welding Foundation, 2000)
Instructional Aids:
1.
2.
3.
4.
Mild Steel Electrode Selection PowerPoint
Mild Steel Electrode Selection Worksheet
Electrode Selection Test
Electrode Selection Test Answer Key
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Materials Needed:
1. One electrode of each type listed on handout
2. Clipboards
3. Safety equipment
Equipment Needed:
1. Welding setup
2. Computer/monitor to support PowerPoint.
Learner
Basic welding shop safety rules.
Introduction
Introduction (LSI Quadrant I):
Discuss with the students what kind of car they need/want to buy knowing that you can’t
get everything you want in one car. Show students a selection of rods. Ask a student to
pick the one that will join tow pieces of ¼” plate. Draw a relationship between doing the
research on choosing a car just like doing the research to know which rod will fit most of
your needs.
Outline
Outline (LSI Quadrant II):
Pass out inductive lesson in shop using
handout. Steps in this lesson include:
1. Send out student with a clipboard to
keep outside his welding booth.
2. Send the student with a listed rod.
3. After welding a bead with that rod,
student should return to clipboard and
record results.
4. Send the student with rod #2 and have
him complete the same procedure.
5. Repeat these steps until all six rods
have been tested.
6. Return to classroom for discussion of
results and guided practice, then return to
Instructor Notes:
Be sure to tell students that the rod
selection can change when you’re dealing
with different thicknesses of metal.
It may also be helpful to send the rods out
in family groups
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the shop for independent practice.
Application
Guided Practice (LSI Quadrant III):
Show PowerPoint and have students take notes on the back of the results chart.
Independent Practice (LSI Quadrant III):
Send students back into the shop to run several beads from each rod family.
Summary
Review (LSI Quadrants I and IV):
Discussion following inductive lesson should tell the instructor if a re-teach is necessary.
Evaluation
Informal Assessment (LSI Quadrant III):
Instructor should monitor progress during the inductive lesson.
Formal Assessment (LSI Quadrant III, IV):
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Written test
Extension/Enrichment (LSI Quadrant IV):
Try giving students a different thickness of metal with the same rods used in the
inductive lesson.
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5
RUBRIC: GRADING MILD STEEL WELDING
Grading for Flat mild steel weld
Grading for Horizontal steel weld
Uniformed
Uniformed
No under
welds
No under
welds
Cosmetic
Cosmetic
Total Score
Total Score
5-best score for each
1-lowest score for each
15-Perfect score.
Grading for vertical mild steel weld
5-best score for each
1-lowest score for each
15-Perfesct score
Grading for lap weld for mild steel
Uniformed
Uniformed
No under
welds
No under
welds
Cosmetic
Cosmetic
Total Score
Total Score
5-best score for each
1-lowest score for each
15-Perfect score.
5-best score for each
1-lowest score for each
15-Perfesct score
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