engineering recuitment UKPSC Polytechnic Lecturer Mock Test 2024 Production Engineering (Manufacturing) Machining Processes and Machine Tools Tool Materials
The most popular and standard type for all purpose tool steels is 18 ∶ 4 ∶ 1 High Speed Steel (H.S.S), which contains
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18% chromium, 4% tungsten and 1% vanadium
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18% tungsten, 4% vanadium and 1% chromium
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18% tungsten, 4% chromium and 1% vanadium
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18% vanadium, 4% chromium and 1% tungsten