METAL PROPERTIES, CHAR, USES, AND CODES - OD1643 - LESSON 1/TASK 2
THE PHYSICAL AND MECHANICAL
PROPERTIES OF VARIOUS METALS, AND USE OF
THE HARDNESS TESTER, CHEMICAL ANALYSIS, AND
BENCH GRINDER TO IDENTIFY VARIOUS METALS
Describe the processes for using the hardness tester,
Within a self-study environment and given the subcourse text, without
Within two hours
No supplementary references are needed for this task.
A very important part of the metalworker's skill lies in his
ability to identify various metal products brought to the shop. He
must be able to identify the metal so that he can apply the proper
work methods of welding or machining to restore broken parts and
put them back into service, or to fabricate new parts to replace
those that are beyond repair.
But whether the work method to be
applied is to be welding or machining, the metalworker must be
familiar with the various metals and should also be acquainted with
the methods used for identification of metals.
Drawings of Army
materiel are usually available and may be used to identify the type
of metal used in the various parts.
However, if they are not
available, simple tests can be conducted in the shop to identify
Since the quality of test depends upon close observation
and experience, their procedures should be practiced diligently