Addition of ______________ in steel is helpful in increasing the depth of hardness?
Correct answer: A. Chromium
- A. Chromium
- B. Sulphur
- C. Vanadium
- D. Tungsten
Explanation
Chromium increases hardenability, allowing hardness to penetrate farther from the quenched surface into the steel. Sulfur generally harms steel quality, while vanadium and tungsten mainly contribute through carbide formation and high-temperature properties.
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