General Studies · Heat Treatment
The process where carbon from an external source is introduced into the surface of low-carbon steel by holding it at higher temperatures in contact with charcoal is known as ________.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1nitriding
- 2tempering
- 3case hardening✓
- 4quenching
Correct answer
case hardening
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