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What is the hardness of tungsten at room temperature?

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What is the hardness of tungsten at room temperature?

(a) 250 VHN

(b) 480 VHN

(c) 155 VHN

(d) 60 VHN

The question was asked in semester exam.

I would like to ask this question from Refractory Materials, Superalloys in section Refractories & Dielectric Materials of Engineering Material & Metallurgy

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Right choice is (b) 480 VHN

Easy explanation: Tungsten is a common refractory material which has the highest melting point of 3410^oC among metals. It also has a hardness of 480 (VHN) on the Vickers scale. The hardness of molybdenum and tantalum is 250 VHN and 155 VHN respectively.

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