Question

Temper in steel is measured by Rockwell hardness test.

(a) True

(b) False

This question was posed to me by my school teacher while I was bunking the class.

My question comes from Manufacture of Tinplate topic in chapter Metal Packaging Materials of Food Packaging Technology

Answer 1

Right answer is (a) True

To explain: The given statement is true. The Rockwell hardness test has been adopted as the industry standard to express temper because of its simplicity and overall good correlation with fabrication requirements. This test is done with a 30kg load attached to a 1.6 mm diameter ball. The load is introduced into the plate surface. The measurement is taken and expressed as Rockwell 30T reading, which can be converted to temper values using arbitrary scale.