Presence of nitrogen in steel___________________?
Correct answer: A. Makes it brittle
- A. Makes it brittle
- B. Increases its strength
- C. Increases its hardness
- D. Is desirable
Explanation
Nitrogen can cause strain ageing and embrittlement in steel by pinning dislocations, especially when present as a free interstitial element. Although it may also raise strength or hardness, the usual metallurgical effect asked here is increased brittleness.
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