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Rockwell hardness test uses either a ____________ ball or ___________ cone for measuring hardness.

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Rockwell hardness test uses either a ____________ ball or ___________ cone for measuring hardness.

(a) steel, diamond

(b) diamond, steel

(c) carbon, iron

(d) iron, carbon

The question was posed to me in my homework.

Origin of the question is Aircraft Materials in section Testing Aircraft Materials of Aerospace Materials & Processes

1 Answer

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Right choice is (a) steel, diamond

To explain: Rockwell hardness value is found by calculating the penetration of either a steel ball or diamond cone under a particular load. The Rockwell hardness number appears on the dial of the machine.

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