METAL PROPERTIES, CHAR, USES, AND CODES - OD1643 - LESSON 1/TASK 2
bars. Solid colors usually designate carbon steel, while twin colors
designate alloy and free-cutting steel.
This task described the processes for using the hardness tester,
addition, the task described the numerical index system, the color
code and the four types of tests that can be performed in the shop
for identifying different metals.
The next requirement is a
practical exercise consisting of several questions designed to
reinforce the objectives covered in the two tasks of this lesson.