SHS2 Manufacturing Engineering · Semester 1 Week 12: Properties of Materials

Lesson notes

Learning Objectives

Indicator: 2.1.2.LI.2 - Measure the tensile properties of steel using the tensile test.

By the end of the lesson, learners can:

Set up a tensile test on a mild steel specimen using laboratory equipment and follow the correct testing procedure.
Measure and record the original dimensions and applied loads of a mild steel specimen during a tensile test.
Calculate stress and strain from the recorded test data using the standard formulas.
Plot a stress-strain graph from the test results and identify the key tensile properties from the graph.
Present the determined tensile properties of mild steel to the class and justify their findings.

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Curriculum details

Strand: Manufacturing Materials and Technologies (Strand 1)
Sub-strand: Properties of Materials (1.2)
Content standard: 2.1.2.CS.2 - Demonstrate understanding on the tensile properties of materials. 2.1.2.LO.1 Explain and measure the tensile properties of materials.
Indicator: 2.1.2.LI.2 - Measure the tensile properties of steel using the tensile test.
Suggested placement: Semester 1, Week 12 (Week 12 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Source document note: The official curriculum document has a fault in this entry, so the curriculum text above is transcribed exactly as printed:

content standard text - p.58: the content-standard token is visibly printed `1.1.2.CS.2` under Year 2 sub-strand 2.1.2 beside indicators 2.1.2.LI.1 and 2.1.2.LI.2; `2.1.2.CS.2` is used as the import code to preserve that printed table association
Curriculum reference: NaCCA curriculum document, p. 58

Exemplars (from the NaCCA curriculum)

Experiential Learning: Let learners in mixed-ability groups perform a tensile test on mild steel to determine its tensile properties such as stress, strain, modulus of elasticity and elastic deformation.
Collaborative Learning: Let learners in their mixed-ability groups plot the stress-strain graph from the tensile test of the mild steel and use it to determine the tensile properties of the mild steel. Let learners present their results to the class and receive feedback.
Teaching and Learning Materials:
- Textbooks
- Videos
- Mild steel Laboratory equipment for performing tensile tests
Assessment (2.1.2.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 1 Recall; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.