High speed cutting tool steels contain about _______________ percent of tungsten?
Correct answer: B. 18-20
- A. 6-8
- B. 18-20
- C. 30-35
- D. 50-55
Explanation
Typical high-speed tool steel contains about 18% tungsten, often with chromium, vanadium and carbon. Therefore the 18–20% range is the appropriate choice, not the much higher percentages listed.
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